I'm on the depo shot and I've been for almost a year now. I don't get my period anymore, but every now and then I do have light spotting, but only for a short amount of time. My boyfriend and I use condoms, but not every time (he pulls out if we don't use them). I've taken at least 4 pregnancy tests in the past few months just in case, and they've all been negative. I don't know how I'm supposed to know for sure if I'm pregnant or not. It's terrifying. I've lately been getting sick to my stomach very easily, and I read that babies can go unnoticed inside of women for a long time. I'm 18 and still in high school and my bf and I are NOT ready for a baby. What do I do???