Anxiety or am i becoming sick? ?

I've felt nauseous for a couple days. I have a nasty feeling in my stomach and throat and it makes me feel like I'm gonna throw up. I have ADD and bad anxiety. I thought it could be anxiety because I'm kinda stressed right now and I get nauceous when I'm anxious, but even when I don't think about, I still feel like throwing up. I've been clenching my teeth and stuff because I have an enormous fear of vomitting. I can't even look,think or smell food because its makes me even more nauseated. I'm already seeing a councelor and I've been to the doctor and they've given me ADD medicine because they think the ADD is causing me to focus on my anxiety. What is happening and how do I get rid of it?! I'm 14 btw