I've taken so many pregnancy test most come back faintly positive, I went to see my ob and she ran blood & urine pregancy test all came back negative..im about to miss my third period..im really worried ive never missed a period and ive had alot of unprotected sex. I'm about to go in for an ultrasound, next week to see what's going on, I mean even my doctor is stunned at this point.. im blooded im sick, I just don't feel right...anyone have any ideas what this could be?. If it's not pregancy this could be a very serious issue..