In September my partner and I had unprotected sex 3 days before I was supposed to reach my high fertility. I use an app to help calculate when I ovulate and when to expect my period. I quit taking my birth control in the end of April and I have had regular menstruation ever since until October. In October I was 2 days late and I figured it was from stress. Now this month I am already 3 days late. I feel bloated, constantly hungry and increased fatigue. I haven't changed my eating or sleeping habits since April. About 6 or 7 years ago I was irregular. I guess I'm wondering if being pregnant is possible since I got my period in October. And if not what could be making my period late or possibly non-existent again.