Hyperthyroid subacute thyroiditis. 25mg atenolol for high hr. 2 weeks later t levels normal endo says to stop taking w/ no taper. 11 days later i wake after every dream with high hr, erratic hr & palps during day. never had before bb. withdrawal?

Perhaps you still need to be taking atenolol since you are having the described symptoms. The dose is a low dose so tapering is not always needed. How long did you take it? If you were taking it for a long time, perhaps a short taper would have been helpful or perhaps you need the atenolol for some other reason. Either way, you need to see your doctor to diagnose your symptoms and treat you.