i was wondering if i could be pregnant I AM 19 YRS OLD....ummm last month on August 6,2012 i had intercourse with my boyfriend and he definitely came inside me i was worry and stress out so i started having a lot of cramps and something bugging me on the lower left side of my hip for like about 1 week or so...then on Aug 15,2012 my period came and it only last for about 2 days it came really light so on the 3rd day i wasn't on my period anymore like it got cut off....on the 4th day i was sort of like spotting some brown stuff..so i thought it was normal...now we are on September so i thought my period maybe wasn't gonna come because i was one day late my period just came Sept 16,2012...and only lasted for 2 days again it just got cut off today Sept 18,2012....so i am kind of worry i don't know what to think i don't know if i am pregnant or not because last month on august i took 2 pregnancy test and they both came out negative...oh one more thing before my period came this month my breast hurt so much like they were sore and tender i couldn't even put on a brawl because it would bug me i even felt them heavy at some point. COULD I BE PREGNANT??