Hmmm... they whole year prior to my recentest flare my tummy would rumble severely and embarrassingly in class and stuff, it was awful. When I told my sister she said, "we all have our hungrier times!" LOL nope it was that forming stricture in my colon.
I guess what Im trying to say is that if you are getting a stricture, the gas may build up and get these awful sounds. I will say this: post surgery I never get the rumbling noises.
Are you flaring right now? Could you be getting a stricture/blockage?