question: my doctor told me i have sinus tach, poss POTS, AORTIC INSUF. I AM ON TOPROLXL 100MG TWICE A DAY. I HAVE CHEST PAIN AND MY DOCTOR SAID IT IS ATYPICAL NOT HEART RELAIED. IHAVE A HEART MURMUR THAT I HAVE BEEN TOLD IS A GRADE 4 WHAT DO I DO? I AM 56 YEARS OLD I WEIGH 125 AND AM 5'2 NO OTHER HEATH PROBLEMS