Digestive problem even after eating righ

It's sometimes like air is trapped (heaviness) between my stomach and chest...When I drink water I had to push that air out... After that I get gas, stomach discomfort and couldn't concentrate on anything. I eat healthy, homecooked food. With same diet sometimes I feel fine... Sometimes I don't Idk.. it's bloating or indigestion. I tried allopathy and homeopathy, during that treatment My sleep problem increased, I couldn't sleep.( I have some sleeping problem but those medication increased). Doctors were fine, and it was general medicines. I m thinking to see an ayurvedic nutritionist now. I smoke once a week (2-3 puffs at max) and I feel bloated/ like air is trapped inside my stomach /nausea. Idk what's happening... All my friends are fine doing that. I also sometimes feel lethargic/fatigued.