For those interested in possible diagnosis, look for information on dysautonomia and Postural orthostatic tachycardia syndrome (POTS). I also read about your suggestions and Mitral Valve Prolapse seems a possible diagnosys. In this case, it is a heart problem, but most people who have it can leave normal lifes. The exams I did in the hospital would not point it. I would have to do an echocardiography. My doc mentioned something about it in case all my blood exams are ok. I will update you all once I talk to him on tuesday. Anyway, my advice to you all: here you can get ideas on what to talk to your doctors but you cannot have a diagnosys, so please if you think you may have some abnormal conditions, discuss it with your doc. It is better to prevent than to cure
Thanks for your support.