You should see gastroenterologist.
Bloating (with burping, early satiety, nausea, heartburn) may be from H. pylori infection of stomach. There's a bretah urea test for diagnosis. Left sided bloating may be from diverticulitis. x-ray with barium enema is for dx.
You can also have two diet trials: lactose free diet (no dairy) for two days, and low-fructose diet (no fruits or any fruit product, no artificially sweetened food which contains sorbitol or high fructose corn syrup) for 3-4 days.
I have had extreme bloating on my left side since February. I cannot move any air at all. I had a perforated colon eleven years ago and five years ago I had a splenic artery embolization. Right now I can mostly just lay in bed and my fatigue is unbearable. I have no idea what to do.