I had unprotected sex on July 29th. Expected my period on July 29th, but it came on Aug 5th (I was spotting Aug 2-3). Usually my periods are 5 days in length with heavy flow early on, but this one was about 8 days with moderate flow throughout, some clots. I was fairly regular with 28 days in my cycle. Didn t have sex since then but now I am 11 days (and counting) late with my period (was expecting it (9/2). Took a pregnancy test, came out negative. Experiencing on/off mild pelvic pain, had extreme pelvic pain during bowel movement. Had diarrhea last night (9/12) No sore breasts or nausea. I had removal of an ovarian cyst March 2010, I m currently 19. Is it possible to have an ectopic pregnancy?