Oh Alice honey that sucks bad! I'm pretty uptight about my gas. My sister has always just let em rip in public and announce she's just a gassy girl. So I feel ya. I just asked nurse friend if she knows a cure, she doesn't and I don't know either I'm so sorry
But I'd try those little yogurt drinks and probiotics. Coffee could be contributing, but I'm sure you don't want to have to part with. And I have nothing to substantiate that, just an idea. I've noticed a heavy coffee day does that to me. :/