Bloating and Belching. Me what to do?

Sir, I belch continuously after one hour of having food and feel bloated. The condition goes worst and gas strike my head. I feel my head conjusted and my breath shortens. This problem is going with me from at about last 10 years.physiciations gave me pantaprazol,domperidon and many more but got no relief. I had consulted gastroenterologist in 2017 and there was no problem in USG report. One gastro diagnosed me migraine and referred to neuro. I took medicines for migraine for 2 years and got relief from headache but gas problem and irretating behaviour went on. Then I consulted psychiatrist and he suggested escitalopram oxalate. I also got relief from depression but my Belching and bloating problem still continues. Please suggest me what to do?