Wow (little piggy, lol!) Seriously, I really feel for you Bev - you have to be far more disciplined than me. Generally, I don't tend to get those REALLY severe reactions to food quite as instantaneously and as violently as you, although I do have my moments. I certainly don't have to eat such tiny quantities - I don't know how you do it.
But I'm sure we all do that - testing ourselves when we're feeling good. It's only natural when we're feeling pretty good to forget momentarily just how awful it was when we were feeling soooo bad. Most of the time we cope, but sometimes it gets us down, right?