Have you tried just doing the sitting meditations (also which can be done in any position)? Everything doesn't have to be at once. Just ten minutes on Small Universerse or Self Concentration helps me manage pain. Granted my condition not as severe, but my muscles try very hard to make my hips meet up with ears, especially after any exercise. I sit, usually with my back supported by my elbows on my knees or I lay down and follow Master Lin on the Small Universe.
By all means listen to your doctor. Master Lin says on all his teachings that this is complementary. Also make sure you put your name on the group healing list. You may be pleasantly surprised.
Deb