Stomach swells after bowel movement

Hi i am 17 and in the last 8 months i've dealt with, in order (parasites, c diff, candida) i am still trying to bring my stomach back to balance. The c diff tore up my stomach and it has never been the same.

This question is more specific although i deal with other symptoms.

Every time i have a bowel movement (which is almost always once daily in the morning) my stomach swells up with gas, a rapid bloating that occurs within a minute after passing the stool. I have no idea why this is, could someone theorize what is occuring that would make my stomach react?

My only guess is that the bacteria get "upset" or the bowel becomes irritated and produces gas, neither of those are scientific to my knowledge however.