I never threw up, but felt like I was any minute the whole day. A couple days later I got my period. Then 2 days later my period stopped. I normally have a 5 day cycle. I took a pregnancy test 3 days later and it showed negative. I have had headaches everyday this week. The last couple days I have had moments of be neaseated. I am wondering if this could be caused by stress. I am 30 have had two children and it does not feel like I am pregnant. What does this sound like?