T.G.
Start taking your basil body temperature EVERY morning at the same time (or around) before you get out of bed and chart it. You can get the charts on line or from you OBGYN. Also check your cervical mucus. You should be ovulating, not just menstruating. I got pregnant three times while breastfeeding. My first was only nine months old when I got pregnant with #2 and I was still BF five times a day. It did take me three months to conceive, but the basil body temp really does work. I also used the ovulation sticks, which are accurate, but not necessary. Or you can have sex every other day, trust me that works too! Don't worry about not having your period back, I have only had three periods in five years.