Missy...congrats on talking with your docs and thinking of a plan that can help you and decrease your pain. Unfortunately all those meds have a depressive effect on the body (not on the mind all the time). Which may be a good reason for your exhaustion. I don't blame you for laying down. I did it for 5 years. Luckily I have evened out and I am working again, but it was a long hard 5 years to get here. Even now I am still very tired.
I wouldn't worry about it....it makes you more tired.