I have the same exact problem with gas. I have been having awful gas but since I started pred, I have been able to let it go without worrying about
accidents which I am thankful for but the wind is embarrassing. Last night it sounded like a car was backfiring in my place. This morning, every time I turned over I let one fly. Worst part was today at work, I went in the bathroom to pee and I let out a loud bit of gas and the bathroom is right next to my male co-workers office. I know he heard. I ran the water just in case but I don't think it did much of a job covering the noises. This guy must think I am a pig.
Sorry I don't have any advice for getting rid of the bloating. I think the more we heal, the better our gas will get.