I take a very low dose of
flexeril at night (I cut the smallest available tabs in half), and I have
robaxin for the day if I need it, which doesn't knock me flat.
You might also want to consult with someone in physical medicine and rehabilitation or a pain specialist. They tend to be much more knowledgeable about the management of chronic pain and musculoskeletal injuries.
Please let me know how things turn out, and feel free to PM me if you want to talk more about it.