I'm 15,I am 11 days late on my period... The past year I a usually 4-6 days late anyway but never 11? I am sexually active and I have unprotective sex with my boyfriend ,he has never ejaculated inside me and says there's no way I could be pregnant ,I took a pregnancy test yesterday and it came back negative? My nipples hurt but that's the only symptom? Am I pregnant? Anyone else had this and turnt out pregnant?