This looks to be a simple problem of colitis
volvulus as your history is about bloating
and passage of gas.
Go for an X-ray of the abdomen in standing position when you have bloating and before you pass gas. This will clinch a diagnosis.
If there is volvulus, you can certainly request for a surgery to fix the colon to the abdominal wall and your problem will be over.
Other causes can be diagnosed on a proper clinical detailed history.
Most of the investigations are normal in such conditions.
start your medical management under the care of a Gastroenterologist.