Stomach Ache

I am still on the no sugar boat. But, I'm having some disturbing trouble now. My stomach has been aching the last few days and I have had some really nasty smelling gas. Yeah. Gross. I did some research and apparently pretty much any symptom is normal with sugar withdrawal. I'm still on board, and I'm still motivated, but I am so curious why on earth my stomach is hurting. I'm literally wondering if maybe there are little bacterias that used to feed off of sugar and now they are dying because they have nothing to eat. Haha. Mrs. Frizzle would know.