Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. Stress and anxiety brings on so many symptoms which medical science finds hard to explain. Chest pain and breathlessness during stress is normal. The reason behind could be the anxiety you have when under stress. The weird feeling of bubbles should be due to the anxiety and they are actually imaginary bubbles. Such bubbles cannot be explained in medical terms. But once you start ignoring them, within a short time they just vanish, sincerely. Try. Even though you do not have any other problems,. I feel stress and anxiety are enough problems to give you sleepless nights. Please do consult a psychologist for further diagnosis and treatment. If you require more of my help in this aspect, Please post a direct question to me in this website. Make sure that you include every minute details possible. I shall prescribe some psychotherapy techniques which should help you cure your condition further. Hope this answers your query. Available for further clarifications. Good luck.