question: hello sirI am 24 years old. Height 54 and weight 55kg.I have constant breathing problem.Whenever i do any physical work like climbing stairs my heart starts beating very fast. i feel tired all the time. I have breathlessness and i always feel the hearts palpitation. Whenever i go to sleep i feel something is going on in my heart i dont know exactly but it feels as if i feel the blood flowing in my heart. I cannot breathe properly even while sitting it feels i am not getting full oxygen. I have been to a lung specialist and all the tests done they are all normal. I had a open heart surgery done for ASD closure in 2007. These symptoms i thought would go away after the surgery but there is not even 1% change in my condition. I feel the same before and after the surgery. Now i cant figure out which Doctor should i see. I have been to a cardiologist and pulmnologist and all tests are fine. Please suggest me which doctor should i see. Also i have lot of gas .....i keep burping all the time..Can these breathing problems are because of gas?? Should i see a gastrologist please advise??