I cannot burp properly, gas keep coming, gas trapped between throat and esophagus and pain in middle between shoulder blades at the back. Help me! ?

Simethicone. There is a medicine that you can buy at the pharmacy called simethicone that may help with this problem. You can also try avoiding dairy products as they cause gas in some people. Other gas producing foods are beans, broccoli and cabbage. You can try avoiding these as well.