I was just diagnosed with IBS. I have not had a discussion with my dr. yet, only had the colonoscopy and told I had IBS. I was wondering why my lower back hurts severly after I eat. I also have a lot of gas, but it is hard to get out. I drink mylanta at each meal and chew tums all day, have tried beano and gas-x...nothing helps. ANy suggestions would be helpful. thanks