Okay, so I have usually a normal period, sometimes its a week late but never more than that, I've taken two at home tests that have been negative and the doctors drew blood and tested my pee and that was negative, still no period. I'm not sure what it could be. I'm not stressed so its nothing like that, but the doctors still suspect pregnancy. I have been having a milky discharge since the days of my expected period and back aches, headaches, nausea and frequint urination, though I have a bladder infection which could explain the urination, but it doesn't explain anything else. I'm just looking for some help. I go for a ultrasound today, April 14, 2010 but I have a feeling nothing will show, what else could cause this?