Oh you're welcome! Wow, I would think the colonoscopy and endoscopy should have diagnosed the problem, because that's what my GI doc did 10 years ago to diagnos me. I also had an Upper GI Series w/Small Bowel follow thru. In this procedure, I had to drink this thick, chalky "strawberry flavored" white substance called Barium. As it moved thru my digestive tract it illuminated everything and they took x-rays of my stomach to see any abnormalties such as inflammation..narrowing of my intestines/bowels, things like that.
I actually don't remember the growling/rumbling starting until some years later, but initially I experienced really bad stomach cramps, no matter what I ate or drank. Nausea/vomiting and decreased appetite, extreme weight loss, constipation.
It definitly sounds like you have a digestive issue going on on some level. I hope my post won't get deleted for this and to the moderator, I apologize in advance but it sounds like you definitly need another opinion, look up Salem Gastroenterology in Winston. It comes right up on Google. (right here in N.C.)
Again, my apology to the moderator if this is against any posting policy. But this young lady needs to find out what's going on with her.
Take care DLC08 and feel free to keep me posted