I have never heard of that test either.
I have some similar symptoms; pain and bubbling in right side of abdomen, mucous in every stool, usually an urgency to go but generally stool is of normal consistency.
My GP initially thought an IBD too, when she examined me, she couldn't believe the sounds and movement coming from my tummy. But I had a colonoscopy and s small intestine barium x-ray and all was completely fine. I'm still skeptical, but have to try to accept the results. By elimination, I'm being told it's probably IBS. Again, IBS is a hard diagnosis to accept, because it just feels like well we don't know what's wrong, so we'll just call it IBS. I read something recently about the bowels being the black hole of medical science. Doctors just don't know enough about it, and it's too hard to find out more. It freaked me out at first. But it also said that as the tum is the most sympathetic organ in the body, that any anxiety will most likely have tummy symptoms. I hope that helps.
Best of luck.