I am 29 year old male. I have been suffering from various pbm which started back in october 2019 after hitting gym I went breathless so went to Dr. They give me antacid I felt better but its been 6 month I have not recovered yet. I belch a lot. I burp 24*7 and feel air trapped in my chest and my heart start to pound hardly. I have acidity as well. And pass gas every now n then and while passing tool I feel breathless in toilet. Heartbeat increases not very high but heart pound very hardly as I said. I do get anxiety when this happens and my condition get worse but after a walk a feel good. This happened everyday. I have done 2 ecg which comes out normal and done 2 d eco too which also normal. Took thyroid test as well no pbm with that too. Sometimes I feel my heartbeat and breast is out of sync. I had to manually inhale n exhale. I have been tested negative for asthma as well. Been to 7 8 Dr. but nobody able to diagnosed my problem. What this might be?