Several good suggestions - one other, is it close to your TOM? It's a little early for anything related to the diet to be affecting you like this with the exception of the sugar alcohol stuff which can happen within an hour or two...

Hang in there and for now at least keep a close eye on things, but don't let this be an excuse to give up something you want to try, at least not until you have given it a good try!

PecanPie