I only woke up once last night, and that was more a matter of needing to go to the bathroom. However, I took a half pill just on general principles of staying ahead of the pain and not waiting for *that* to wake me up; same thing this morning.
I do still feel tired and achy from three hours in the chair, but that'll ease off with some walking around the house, and probably a nap :-) .
Thanks again for all the good wishes. I firmly believe that they help.