I have been on depo provera for the last year. I do not have a regular period and missed my last depo shot, which should have been about two weeks ago. For the last couple of weeks I have been feeling very nauseated, get headaches all the time, I feel tired and even take naps whenever possible, I have noticed a higher sensitvity to smell, I feel bloated, and my appetite has increased a lot with a particular want of sugar. I have had unprotected sex with my boyfriend and I was wondering if what I am experiencing is from missing the depo shot or if it's because I am pregnant. I have taken a couple of home pregnancy tests but they came out negative.