Hi Nelson... how old is your little one? Are you still breastfeeding? How many postpartum periods have you had? After my first child I got AF back around 8-9 months pp and it took over a year after that for my cycles to regulate. I would have long cycles, short cycles, normal length LP's, short LP's, spotting, etc. After dd nightweaned things started to regulate and I ended up getting pregnant shortly after.
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I would highly recommend reading Taking Charge of Your Fertility and starting to chart your temperatures and cervical fluid. These are much easier symptoms to track than cervical position. You could run out to your local drug store and get a basal body thermometer and start temping tomorrow morning! Just try and take your temperature first thing when you wake up (don't get out of bed, don't drink any water, don't sit up), after a decent block of sleep (3 hours or more is recommended), and around the same time each day (within half an hour).  Also mark down what your cervical fluid is like: dry, sticky, creamy, eggwhite, wet.  You can log your data on a free site like www.fertilityfriend.com so that you can share you charts with us and we can give you tips and help you decipher anything that is confusing. Charting your temp and cervical fluid will tell you when you are fertile, when you ovulated, how long your luteal phase is, when to expect AF, if you're pregnant, and if there is anything of concern happening with your cycle (like the spotting you mentioned). My LP is 10 days on average (with no spotting), but as a pp mentioned this is about the shortest it can be to achieve pregnancy or else the egg may not have time to implant and start producing hCG. Spotting often indicates low progesterone or at least fluctuating progesterone, which could get in the way of TTC. Charting will help you to see better what is going on and there may be simple tweaks to your diet and/or lifestyle that could help strengthen your LP.
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Charting cervical position is a nice addition to temp and CF, but like you've noticed it can be a bit confusing at first. I would highly recommend continuing to check your CP and see how your observations line up with your temp and CF. This will help you understand better what you're feeling. In general start checking your CP when you notice fertile cervical fluid (creamy or eggwhite). Your cervix starts off firm, low, and closed. It will feel like the tip of your nose and the cervical os will feel like a dimple. As you approach ovulation it will start to soften, rise up, and open. On your peak day it should be mushy like your lips, high up- maybe even difficult to reach, and the os should be open. After ovulation it will firm up, lower, and close again. But you don't need to keep checking it during your entire LP as it can also change off and on and it's easy to read into it and drive yourself a bit crazy. But as you approach AF it will open again to allow the blood to pass through whereas a pregnant cervix will remain closed. Check your CP at the same time each day to remain consistent. Many women choose to check it in the shower since you're already clean.
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Good luck!