Throwing up in restaurants?

Felicity
So recently last couple of times I've eating out with mates or my boyfriend I get all hot all of a sudden and then need to go to the toilets to throw up? 
I've been suffering with anxiety for 7 years now and never had an issue with eating out and now all of sudden I'm throwing up every time I eat out? 
Can anyone help? Is it just a new part of my anxiety?