I Usually Have An Upset Stomach Most Of The Time

I usually have an upset stomach most of the time right after eating. I just had a can of Progresso soup and feel nauseus and get little relief when I burp. I have no gall bladder and just had a colonoscopy that found 2 tiny polops and diverticulosis. I feel like throwing up but don't. I am on Metformin and food goes right through me and I wonder if I am vitamin deficient because of it. I just got on CPAP therapy but can sleep for 10 hours and am still tired. I used to have energy and walked a lot. Now I just feel sick all the time.