About 2 weeks ago I hooked up with a guy who broke my hymen while fingering me. I am a virgin and have not come close to having sexual intercourse. I usually have my period around the beginning of the month or sometimes near the middle, I am 16 so I guess my menstrual cycle isn't completely in sync yet but, it is almost the end of the month and my period hasn't come. I'm really worried about it and I'm afraid I could be pregnant, what's going on?