I’ve been on birth control for a week and it says online that it is effective after two days. On the 7th day I had unprotected sex, and got nervous and took a plan b. Idk if I’ve ovulated because I had two periods in one month because I took a plan b next month, that’s why I decided to get on BC. I have a upset stomach and constipated but that was before I even had the unprotected sex, it was from the BC. How worried should I be?? I’ll never do this again.