I had unprotected sex on November 10 and a day after that, I felt real dizzy and I even threw up. This has been going on for the past the days. I burp more than usual, use the restroom so much more than often and stomach pains. Today is the 13th and I had my first sharp breast pain and lower left back pain. Also, I had a basketball game a few hours ago and I lost breath just trying to get down to the other side of the court. Im scared and very young and I just wanna know what's going on with me.