The last time I had my period was October 2nd. It was completely normal, lasted about 5 days. I had unprotected sex with my boyfriend about 3 days later, but he pulled out before he cummed. 2 weeks later, it's like I almost got my period again. a full 4 days of bleeding, but not as much as my usual period. I missed my period, November 2nd, but now, December 2nd, I'm starting to get shooting pains throughout my vagina and anal area, lasting only about a minute. My boobs are also extremely tender and a little bigger. I don't think I'm pregnant, I'm only 17, because I've had sex like this many times before. Same boyfriend though for four years. Has this happened to anyone else? A missed period after starting to bleed 2 weeks after your last? HELP ME PLEASE!!!