On 4/21 I started TriNessa to clear up some mild acne and regulate my cycle. well, about 13 days into taking the pills, my boyfriend and I had unprotected sex. he says he isn't sure if he came or not, but there was definitely precum. it's been 5 days since we had sex and my stomach is killing me. HORRIBLE cramps. no bleeding, sore breasts, nausea, anything like that. only cramps. my third week of pills will run out sunday and then the placebo week starts. i'm still really confused about that but apparently i will start when i get to those pills??? anyways, i feel like i might be pregnant and i'm sooooooo worried. someone please help me so i don't absolutely lose my mind. oh, and i started my period april 20th last, so it seems a little early to start it yet.. is it 28 days AFTER your period starts or after it ends?? HELPPPP!!!!