Ok so background story: Recently I just got a boyfriend but before him I was sexually active with the only person I've ever been with. When me and my first started having sex regularly, my period changed. It came a week after it was suppose to every month. That went on for two years. But now I have this new bf and we had sex for the first time yesterday. Safe sex of course. After sex, I went to pee and I had a burning sensation. And if that didn't throw me off enough, I stated my period today. Now I just got off my period on the 28th and I'm kinda freaking out because idk what's going on.