Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. If there is something, definitely the health people would have found it. If your health people are sure that there is nothing, there is nothing. About your mental condition. It is possible for people suffering from some mental conditions to have illusions of movement or activities inside their own body. The disturbances increase mainly because of their obsessive thinking about the same movements within them. First of all they are imagining the problem and then they are obsessive about it. This obsession creates anxiety. Please be assured, there is nothing wrong within your body. Get treatment for Obsessive Compulsive Disorder (OCD) from a renowned Clinical Psychologist and the problem shall be cured. 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.