Your story is very similar to mine. My AS started right after I contracted chlamydia trachomatis. I also had multiple stints of severe food poisoning while travelling around south east asia. My diet was probably about 90% grains. Minimal veggies and rarely fruit. Typical lunch for me was two grilled cheese sandwiches(white bread of course), doused and fried in margarine, ramen noodles and a hearty serving of sour cream and onion pringles. Whenever I was traveling, I would always fall back on my western "comfort foods" that consisted of pizza hut, mcd's, burger king and so on.
Really happy to hear that you're doing well. Nice to get back in the gym? I shared your apprehension before my first dose of pstarch. Once bitten, twice shy. I'm hoping it works out for us.
Anybody tried soaked grains and lived to tell about it? I'm nowhere near that point yet but I'd like to eventually add a variety of resistant starches and see how I react.

Mark Sisson had another RS article the other day;
http://www.marksdailyapple.com/resistant-starch-your-questions-answered/#axzz2xzZ10lgf