Just a thought, if the tummy swelling gets worse at certain times, you might want to check for SIBO. I had it for two years before I got a diagnosis. My stomach went from normal to 8 months pregnant-looking in a hour +/- after eating, horrific and painful. Specific antibiotics and a diet change. Not less food as much as just certain food avoidance.
If your doctor doesn’t do breath testing for that, I believe you can buy a home kit.
Good luck!