How to combat nausea while suffering with GAD?

I've been diagnosed with General Anxiety Disorder and my main problem, besides my constant worrying or paranoia is eating. when I feel anxious i cannot eat. sometimes when I get over the anxiety i am still nauseous. last monday i woke up anxious because my husband had an important appointment and I threw up the entire day. Even after it was successful I could not stop feeling sick to my stomach. I haven't eaten in 4 days and I've gone from 117lbs to 111.5. I vomit everything, and even nothing. I can't even keep down water. i don't want paxil anymore since coming off of it is terrible. is there something i can do to stop that feeling in my tummy? it burns and i want to be able to eat. I have no body image issues, I just can't keep anything down...