Serious gas and acidity problem.

I have very serious problem related to my stomach and esophagus. For last 1 year I feel regular gas and acidity problem. Excessive gas production and gas release.. Acidity, excessive belching, undigested food coming out through esophagus. At night sometimes suddenly wake up from sleep feeling gas coming upward  in the chest. It feels like very much chest discomfort sometimes pain or even sometimes breathing issues. And at that moment I feel like high bp..it feels like heart attack or stroke something will happen..then if gas tablet is taken then its little better. Tried homeopathy and also Ayurvedic. In homeopathy. Initially was better but after 2 months of medication then it again started and more serious than earlier. As of now I'm taking Ayurvedic medicine for last 15 days. But I'm not seeing that much improvement. Please guide me. N.B- tested LFT, lipid profile, Upper abd USG ( all are ok somehow)