Okay here are the facts: 3 weeks ago my ex-boyfriend and I had sex for my first time, but with a condom. He did not finish so the possibility is super slim. But 3 nights ago I was hanging out with 4 friends (a girl, 2 guys, and myself) and we started drinking heavily and were quite tipsy. By the end of the night I sobered up, enough to know what I was doing. My best friend, who I have liked for 5 years, pulls me into a room and pulls out his penis and told me to have sex with him. Me being the stupid girl I am I do as I'm told, doing what all girls do but think "If I do what he says he will come to like me eventually." We had sex twice, without a condom, within an hour, and before I left I came to my senses and told him to stop, but for the third and final time he pushes me into the coat closet, me screaming, crying, and hitting him - hoping my other friends would hear me over the loud music playing in the basement. With no luck he proceeded to have sex with me, and him being drunk he did not feel him finishing so I turned around, slapped him, showed him the dripping semen, and rushed out of the house. I went to shoppers and took Plan B an hour and a half later. It is now 3 days later and I have severe cramps (mostly on the left side. I do have a history of getting cysts on that ovary, causing alot of pain from contortion which results in necessary surgical removal), lower back pain (possibly from volleyball?), missed period for 5 days, constant feel of needing to urinate (history of multiple U.T.I.'s), and the feeling of a period coming on but to go to the bathroom and have nothing there. Yes, I am almost 16, my periods are irregular, but I am nervous and cannot stop worrying about this. To be pregnant after my stupid actions wouldnt be what I planned for in life, yes people could say I "learned my lesson", but no one would want to go through this.