I have the same problem...I've been gluten-free for almost 10 months now, and it takes absolutely NOTHING for me to bloat up & look pregnant! It bothers me to the enth degree but I'm starting to accept that there's nothing I can do to help it. Breaks my heart to see myself looking so big for no reason in the mirror though - I follow a strict gluten-free...
I've been practiving Bikram Yoga for a few months now, and it does WONDERS for my digestive system...thing is though, I had to lay off bit when school started & wasn't able to go for ~2 weeks or so. My digestive system felt like it came to a grinding halt, to the point where I was suffering severe abdominal pain & had to seek medical help! I guess...