Digestion and breathing. It may be.

Male, 26years,lean physic but protruding belly. I have breathing problem from 6 months. Actually it is present ALL DAY and DAILY and it gets worse whenever i have food(lunch, dinner, breakfast). I goto sleep 2hr after dinner,after 20 mins of sleep suddenly get up with breathing difficulty, den i have 1 glass water and sleep easily till morning. Den again discomfort in upper chest and breathing prob in morning, due to which i getup early. Wen ever i hv food, discomfort in upperchest, stomachand tightness in mouth muscle. If i have alcohol, the next day the symptoms is very severe (breathing, stomach discomfort, chest discomfort). AlwYs feel tightness in mouth and neck muscles. Even while not having food also problem exist but little mild. Can walk for 4kms in 30 mins.. But cannot run or jogg. This problem is more in sitting position. Cannot eat more food because of this problem. Not able to goto doctor due pandemic in our zone. Please suggest. What problem it may be.