I take Stemetil for my nausea which is a result of both anxiety, and long term sinus/inner ear issues. However when its super bad, Im with Nanners, Zofran is very strong and effective. You need to get to the root cause of why you are actually vomiting. Of course its part of anxiety, but with the right tools, you could learn to NOT actually vomit. I always used to vomit but as I got more and more used to this illness, I found through a combo of meds and therapy that I have the keys to controlling at least some of the side effects.
All the best, you are not alone-