I was on inderal(propranolol is the generic name) off and on from 83-93, mostly on, when I was off I was off for about 3 and half years after an Ep told me I didn't really need it, coincidentally I happen to see the very same EP again 5 years later and he suggested I take atenolol, which I have found to help greatly, inderal did too, but like anything else your body becomes used to it and you need higher doses.
Inderal is one older and as i understand a very safe beta blocker, it might help you with your symptoms, Like I said I was on it for about a total of 7 years without any problems and at the time it helped alot. Good luck.