No you should not worry.
However, from what I understand, it is impossible to deliver a transverse baby vaginally. You may try to alter the position of the baby with help of contractions early in labor, but this is a serious condition. I would not proceed at home without the ability to assess the baby's heart rate and knowledge of how to interpret the signs. If you are unconvinced that this is a potentially serious situation, I would simply look up images on google of a transverse lie. They are sobering.
A baby in a transverse lie would present similarly as an obstructed labor; I've included what I know about this below:
Cephalopelvic disproportion occurs when there is incompatibility between the size of the baby’s head and the maternal pelvis. When a labor stalls, parents are often afraid of cephalopelvic disproportion or a true boney obstruction, which is a serious condition that grows progressively worse the longer it is undiagnosed and untreated. Thankfully, true cephalopelvic disproportion is extremely rare[i] and the condition is actually highly over diagnosed.[ii] Two thirds of mothers diagnosed with CPD go on to deliver larger infants vaginally in subsequent pregnancies.[iii] Obstructed labors began to be attributed to cephalopelvic disproportion in an era in which most mothers suffered from malnutrition disorders such as rickets. (Rickets is a vitamin D/ calcium deficiency that affects the bones, specifically the pelvis.) A mother may be at risk for pelvic dystocia if she has had a previous pelvic fracture or a known pelvic type other than the ideal gynecoid pelvic shape. A mother with this history can make a pelvimetry appointment; pelvimetry is the assessment of the female pelvis for labor and delivery where a practitioner may predict CPD. (Though finding a skilled practitioner may be difficult; it is becoming something of a lost art.[iv])
Pelvic dystocia can be identified by frequent, long lasting contractions over many hours without any change in the position of the baby, or the behavior of the mother, or the cervix. Often an active labor contraction pattern reverses; contractions grow further apart. Contraction pattern may be erratic in intensity and duration and often cluster, with two or three very close together, followed by noticeable pauses. Highly localized pressure or pain is felt; back pain is also common. Rupture of amniotic sac is common, so is evidence of meconium. The baby’s presenting part often cuts off circulation to pelvic region, causing vagina to feel dry and often hot while swelling in the external genitals (the vulva and labia) and cervix is also seen. The baby will usually begin to show signs of distress and the mother will ‘know’ that there is something wrong. A retraction ridge often forms between the thicker and contracted upper uterine segment and the thinning lower uterine segment. “In normal labor there is no need for the lower segment to become unduly distended, because the fetus is gradually being expelled through the dilating cervix. In cases of obstructed labor, where the fetus cannot descend to pass through the cervix, the lower segment must stretch to accommodate it, because the fetus is being pushed out of the shortened upper segment.”[v] When the normally occurring retraction ring becomes visible, it is called Bandl’s ring. One of the easiest to identify and most common signs of pelvic dystocia is a lack of fetal engagement. The baby’s station remains high and stays the same over time. This is only a sign of obstructed labor at the pelvic inlet, though most cases of obstructed labor occur at the pelvic inlet (thus preventing engagement). The pelvic inlet is the line between the narrowest bony points of the sacrum and the inside pubic bone; ideally this plain should measure 10-11.5 cm or more. [vi],[vii]
(SB: Signs of Obstructed Labor:
1. Contraction pattern is erratic in intensity and duration. Contractions often cluster, with two or three very close together, followed by noticeable pauses.
2. An active labor contraction pattern reverses; contractions grow further apart.
3. Lack of fetal engagement: baby’s station remains high and/or the same over time. Most cases of obstructed labor occur at the pelvic inlet thus preventing engagement.
4. Sufficiently strong uterine contractions make no changes in cervical dilation for over 4 hours.
5. Poor cervical effacement (thinning); the cervix retains shape as it dilates giving the feeling of an ‘empty sleeve’.
6. Back pain is experienced during and between contractions.
7. The presenting part cuts off circulation to pelvic region causing vagina to feel dry and often hot.
8. Pressure or pain is felt in a specific location.
9. Maternal sense of exhaustion, anxiety, and sense of a worsening condition.
10. Rupture of amniotic sac is common.
11. Abnormal maternal vital signs: pulse above 100 bpm, low blood pressure, and respiration rate above 30 bpm, possible raised temperature.
13. Swelling in the external genitals (the vulva and labia) and cervix.
14. Swelling on the baby’s head (a caput).
15. Premature urge to push.
16. Bandl’s ring may be present.)
Preventative treatment include this exercise, and excellent chiropractic care. Handstands in the pool also wouldn't hurt.
Supine Inversion Technique
This exercise has an excellent success rate for gently turning engaged babies with malpresentations.[i]
1. Ensure the mother’s bladder and stomach are empty.
2. Place three firm pillows under her hips to raise them about a foot off the ground.
3. The rest of the body should be on the bed or floor with no supporting pillows to create a gentle supine inversion.[ii]
4. Stay in inversion for 5-15 minutes.
5. As an alternative, the mother can use an inversion table if she has access to one.
[i] Khorsan R, Hawk C, Lisi Aj, Kizhakkeveetil A. “Manipulative Therapy For Pregnancy And Related Conditions: A Systematic Review.” Obstet Gynecol Surv. 2009 Jun; 64(6):416-17.
[ii] Ridley, Renee T. “Diagnosis And Intervention For Occiput Posterior Malposition.” Journal Of Obstetric, Gynecologic, Neonatal Nursing, Volume 36, Number 2, Pp. 135-143(9) Blackwell Publishing March/April 2007
[i] American College Of Obstetricians And Gynecologists: Dystocia And The Augmentation Of Labor. Technical Bulletin No. 218, December 1995a
[ii] Cunningham Gf, Gant Nf, Leveno Kj. Section V. Abnormal Labor. In: Williams Obstetrics. 21st Edition. New York 7 Mcgraw-Hill; 2001. P. 425–67.
[iii] Brill Y, Windrim R. “Vaginal Birth After Caesarean Section: Review Of Antenatal Predictors Of Success.” J Obstet Gynaecol Can 2003;25:275–86.
[iv] Maharaj D. Assessing Cephalopelvic Disproportion: Back To The Basics. Obstet Gynecol Surv 2010; 65:387.
[v] Myles, Margaret F. Textbook For Midwives: With Modern Concepts Of Obstetric And Neonatal Care. 10th Ed. Churchill Livingstone. 1985 P249
[vi] Kaltreider Df: Criteria Of Midplane Contraction. Am J Obstet Gynecol 63:392, 1952
[vii] Mengert Wf: Estimation Of Pelvic Capacity. Jama 138:169, 1948