Hi there Pippy,
Well i had surgery about 9 yrs ago and although i felt a major improvement afterwards, i still had bouts of D and suffered bloating and distension. When i informed my GI of this and asked whether it could be the Crohn's coming back he very quickly brushed it off and said "you look fine" and that i was in remission. He said the symptoms were just IBS and it was perfectly normal. Basically he meant go away and stop wasting his time. Back then my knowledge of this disease was very minimal and i didn't question his comments. So i trusted him that i was in remission and should just get used to the "IBS" symptoms. Which i did for the last 9 yrs and in the last yr they've gotten worse and i bloat so bad i look 6 months pregnant, my tummy has started making crazy and embarrassing noises every time i eat and the D is gradually getting worse. So I requested from my GP that he refer me to a new GI as i had discovered this website and was given some very helpful advice from other members that this was most likely a stricture.
So i had a colonoscopy last wk and an SBFT today and wouldn't you know it, the area they resectioned is narrowing badly and now there's abnormalities in the large bowel too. It's obviously been getting worse over all those yrs (he didn't put me on any preventative medication either after my surgery) So i would definitely recommend that you get your GP to refer you to another GI, even if you have to travel a little further, it's SO worth it. I feel like going back to my old GI and punching his lights out for being so dismmissive and patronising. But i don't think that'd be a great idea I might just make an appt with him and confront him about his 8 yrs of crap advice. Better to get it off my chest than to be feeling angry about it!!
So i personally feel that when your tummy starts making those noises, it's yelling out for some attention, literally! and there is most likely some narrowing somewhere. Try to get to the bottom of it asap. And although it's easier said than done - try to be assertive and don't take any nonsense. I am generally a quiet and shy person but i have lately become very outspoken when it comes to doctors and i refuse to be fobbed off with the usual rubbish, and believe me, they may not like it very much - but i have actually gained much more respect from doing so. It's like they suddenly take you seriously when you act like you mean business and don't just agree with everything they say.
Sorry about the long reply but I just think the sooner you find out the reason for this, the less problems you'll have to deal with. Hopefully i'm wrong and it's just a case of loud digestion. Best of luck anyway and be stern with those docs.