@jane_shanahan , you have to understand the causes of pain before you can start to treat it. The following may help in the respect :-
As you will see the neuropathic pain associated with MS is treated with meds that try to dampen down the pain. If you were to taper off the Pregabalin, trust me, you would notice the difference!
The Osteoarthritis needs a different approach, as detailed here :-
The Capsaicin Cream sounds interesting……..