Ive been on bc for 3 weeks and yesterday i just started the sugar pill. A couple days ago me and my bf had unprotected sex thinking it was okay because i am on birth control, but about 3 days after sex ive been feeling odd. Like my stomach is hurting, not bad but feels like a small stomach ache, ive been getting kind of hot and i feel a little pukey, but not to the point id actually puke, idk if im just reacting to the birth control or if we made a mistake.