I can completely relate. I used to have to throw up before any social event. It was completely involuntary. If I was going out to do something social like a concert or going out to dinner, my stomach would get upset, I'd throw up, but then I'd feel a lot better and was ready to go. Since then, my anxiety medication has leveled that out. I still get nervous, but don't need to get sick anymore.
I would recommend counseling to help you deal with your anxiety. It's common to have a sick stomach when you have anxiety because of excess stomach acid. Ask your Dr if it's safe for you to take something for this before and during your pregnancy.