Hi I'm between 2-3 weeks late on my period. I have take 3 pregnancy tests, but they were all negative. I have slight nausea, backaches, CM, tender breasts and nipples, very emotional, heartburn, bloated, fatigue, and cramping as though I'm about to get my period. I've also been extremely tired. I have a doctors appointment on may 30th to start the depo rather than taking the pill because I always forget it. I haven't taken it since November of 2012 and have always had regular periods. I have unprotected sex all the time. This is the first time I've ever missed a period completely. I just wanna know if this is all in my head or if I could actually be pregnant.