I'm 14 weeks pregnant and just in last week I've thrown up twice, both times late at night. I take my prenatal vitamin before I go to bed - do you think that's a culprit? I'm afraid to stop taking it because my appetite is non-existent and I'm not eating a lot of fruits and veggies. Should I be worried about getting sick? I never threw up at all in the first trimester. I just thought I was starting to feel better, and now this!