I soooo have the same problem! I only found out this evening that my disorder has a name, so I searched the net and found this site, I can't believe how common it is!
I am planning a weekend away in September with my new boyfriend and I am worried about not being able to go and ending up in agony.
He lives 50 miles away from me so we spend over a day together at a time. I just hold it in until I get home as I just cannot go whilst I'm round his house, or whilst he stays at mine.
I have order Baz's book so read as a bit of self help in time for our break away so hopefully it will help.
Have you read the book?