I have been having palpitations for a few months now, most all the time at night when in bed, was prescribed Alprazolam 0.25mg 3 times a day was still having palpitations at night, then was prescribed Propranolol 20mg 1/2 a tablet at night, have not started them yet, did a stress test and cardiologist said my heart is fine, my md prescribed the Proranolol, should I see a cardiologist while taking this med, rather just take the Alpazolam than the Propranolol, can this cause damage to a normal heart, will it make palpitations worse, female 54.