Whenever I eat something, be it simple rice and bottle gourd sabji, after that my chest area feels tight and blocked and belching happens. Also my head feels heavy and breathing problem started. When air is coming through air I feel relief but for only 2 seconds. This time I also feels palpitations and my hands and feet become cold. Also it feels that gas is traveling in the back side besides my rid.i have tried lot of allopathy medicines but no help. All the test like CTS scan, endoscopy, manometry test came normal. Also my vitamin b12 is becoming low and I have to take injection to boost it. I have also lost weight . Biopsy done and it came normal.I have tried homeopathy also like Raphonus, carbo veg but no help.also this episode time I feel difficult to talk.Please help me, it actually disturbed my physical and social life. I don't drink or smoke. Please help me.