What Causes Bleeding Mid Cycle?

Hello. My name is Catherine and I m a 16 year old girl. Two weeks ago I got my period, but now I m having it again. And the pain levels are unbearable. I m really scared and beyond clueless. About a month ago, I visited my beloved boyfriend and husband to be, we did NOT have sexual intercourse but he was on top of me because we were playing a game and I won, therefore we were play wrestling. Even though we did not have sex, I ve been stressing myself out so bad that I ve been losing sleep. I m afraid of having a child at such a young age. Is it possible that I m pregnant, or is this irregular period really due to stress like I ve been reading? Please answer asap, I m really concerned.