First, you PCP is full of crap. Can you get to a pain management specialist for some real help?
My pain management specialist is a neurologist. He has dealt with other PALS and all have had some degree of pain, some horrible, even while they're still mobile. He is also certified to recommend medical cannabis, thanks to my constant hounding him for a year.
I've tried prescription creams (very strong with five ingredients) but what helped most is THC topical cream combined with CBD oil under my tongue. If the pain is terrible, I take 1/4 of a 15 mg. Oxy to break the pain cycle and it seems to work. I alternate tylenol and Advil on a daily basis. NSAIDs tend to mess up my stomach so I can only use Advil a few days a week.
Other things that provide relief are consistently using my lift chair with a heating pad on my lower and mid- back, adjusting my bed and putting a pillow under my knees to take the pressure off my back, not overdoing it physically and trying not to stay in one position for too long. Very gentle massage as helped, warm showers before bed followed by THC cream on all the sore spots really helps with both sleep and comfort.
PT helped my knee but I found a good therapist who followed my direction and listened to me.
I have a torn rotator cuff and a combo steroid injection/lidocaine helped for about three months.