Wife to DH who worships me (code for tolerates me) (2001), mom of one DD (April 2002) and one DD who arrived forcefully (Sept 2009) Caretaker of Boogie the cat and fish/reef hobbyist. Just tryin' to maintain... In major need of...
SAHM to Coraline Mae, born 09/16/09. Expecting #2 10/04!
Vice President of Boston Babywearers
Your baby could be transverse and low, with his/her back laying across the bottom of your uterus, that would explain the heaviness at the bottom and the movements on both side.
Baby could be breech with his/her butt down low, again makes sense. The head could be deeper in your uterus (towards your spine instead of towards your abdomen) which is why you can't find the head (I can't find my baby's head very often).
I don't know!! like I said, I thought I had this guy figured out, but now not so much!
If you feel one side of your tummy hard and the other a bit squishy, the hard part is most likely the back of the baby and the squishy is where the arms & legs are.
But I only really know where the head is when teh baby hiccups!