Candy, were you still in normal range pre-op or on BP meds? That also affects just how low you can get.
Example, I was never on BP meds, mine ran normal all my life...high normal but normal (130/80 typically). Now I'm doing good to get 100/65.
Dh, on the other hand, was on two BP meds to keep his in normal (125/80). Now he typically runs 120/70 with no meds.
So where you started from is a part of where you end up...and yes, too low can be an issue IF it is causing you problems...if not, just enjoy it. And SMILE! Lowered BP is a NICE side effect of the surgery.