Since you have no other answers, I'll throw something out there. It could be anxiety. Sometimes even you don't feel like you're anxious, it'll still affect the stomach. And I know that some of those inhalers "amp" people up.
And if you change your eating habits that'll affect your digestion for sure. So you may have a couple of things working here.
In any case, it's my experience that diagnosing problems like this can be a fairly long process, so just stick with it.
just adding this since i ran out of space i could use I went to the dr he thinks it is ibs I personally don't think it is ibs cause from I read about ibs I don't think its constant like this and im not stressing and im not eating anything bad right now.I don't have insurance so he couldn't send me to a stomach dr so he gave me prevacid and said it should clear in a few days its been a week since I saw him still pretty much the same