I haven't been served yet so I cannot offer anything to you with regards to that.
I like that you were ablet to look out for yourself and tell him you wanted to be alone. Smart IMO given how you were feeling. I think Fixer offered some good points. I would add that as much as you can do physical things. Walking, exercise, anything! It will help you to get rid of some of that panic feeling and allow your head to clear (maybe only just a little) so you can think.
