So I had sex on February 18 and started my period on February 25. It was really really weird. Like normally I have this super heavy period that lasts like anywhere from 7-10 days. This time I had a kind of heavy first day. Then for 5 days after I had this light spotting thing that randomly got like a little heavy then spotting. So when I had sex he didn't use a condom and I'm not on birth control. He doesn't know if he came a little in me because he was drunk but he pulled out before he came a lot idk if that means still a little in me. I took an emergency contraceptive the day after so maybe that's the cause for my late and extremely weird period. But today I'm having bad PAIN like on my left side under my ribs at like my waist area and cramps. And lately like around my, down there, i get random pains on either side. I'm not sure if this is an std or if I'm pregnant. I did take two pregnancy tests probably too early. I've also been super nauseous and emotional lately even my mom noticed. I took one the day after and one three days after. Help omg my stomach hurts I'm so nauseous.