Casey, I was going to post something asking you how you've been as I hadn't seen any posts from you in a while.
I'm sorry to hear that you're not doing well again. I think feeling great, and then going back to feeling lousy has got to be one of the cruelest jokes.
Could it be you need a higher dose of your anti-depressant? Remember that food isn't the only IBS trigger. Have you been stressing a lot because of money Or anything?
Could you have a bug in your system? Colds and viruses affect IBS a lot. Have you thought about going to your doc for a check up to make sure you're not anemic or anything like that?
I don't know if this is of any help, but you were pretty stable for quite some time and it will happen again.