My period isn't due til april 18 2011 my period is regular 28daycycle. me and my fiance had unprotected sex on the days I'm suppodse to ovulate. I started spotting on april 5 2011 and then it got heavier. I started bleeding and then it would stop for some time then start again. I also exprerienced some abdominal cramps and this is nothing like my period no where near it. We are tryin so hard for a baby. What is wrong with me and I've been having this on and off bleeding for 8days straight now but I am not on birth control