Hi Stephanie. You kind of sound like I did about 4 months ago. I stopped taking bc at the end of February. My husband and I were ready to start a family but I had heard that it could take several months before your body adjusts. My periods were all very normal while I was on the pill. After my last normal period, the next one didn't come for 41 days. So the next month, I waited and waited thinking that maybe it would come a little sooner this time but it didn't. I started feeling naseated at night but I didn't think anything of it. I was feeling the cramps that I would normally get before my period so I kept thinking that it was coming. After about 43 days and still no period, I decided to take a test. It was positive. I was shocked b/c I didn't think it could happen that soon, but it did! I was 4 weeks when I took the test. After that, I started getting more symptoms like my breasts getting VERY tender and bigger. I also started spotting after that so I thought I was losing the baby but then I found out it was just from the embryo emplanting itself in my uterus. I continued cramping for several weeks.
Hope this helps.