Stomach discomfort and breathing.

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 go 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. When not having food also symptom exist but mild. More problem in sitting position(breathing and stomach discomfort) Can walk 3km in 30 mins ,but problem if run or jog. Tightfeeling in mouth muscles when difficult breathing. Cant goto doctor as pandemic. What problem it might be. Please suggest