my boyfriend and I had oral sex. We re both still virgins and we know that if it went as far as sex, we would use protection. Two days after I started to feel a little sick. I started to feel really dizzy and tired. I didn t get.much sleep the night before. For the whole day I have been feeling nausea, tired, dizzy, and my stomach has been very sick. am I at risk of an std? We both look up all the different stds and risks. do I have an std or am I overly anxious about this?