I'm kind of freaking out. I dont know the exact dates but these are pretty good rough estimates. around march 6th i stopped taking my birth control because i had missed quite a few. that was also the last day of my last period. my fiance and I had unprotected sex and he finished inside me about a week before that. then we did the same thing with him finishing inside me again on March 22 & 23 & maybe (pretty sure) the 17th. well March 27 & 28th I bled a little but it was like a dark brown spotting not really bleeding. nothing like a normal period. I took a pregnancy test on the 31st & it was negative (was that too early?). its now the 15th and I still havent had my period, my lower stomach has sharp sharp pains, my boobs have gotten bigger (even my fiance noticed) & my nipples are bigger darker & sensitive. also on the 30th i woke up in the middle of the night throwing up randomly for no explained reason..... what should i do?