Anyone here have knee problems?

I've had problems with my knees for years (I'm 55) from lifting....I used to deliver appliances and furniture and of course the abuse in the garage. I go to a chiropractor when they get too bad and he adjusts them..normally wait til I can just barely walk but the swelling goes down and I get movement without pain. That was until last year when I had my left knee go out from under me when I was on a ladder. I fell and broke my ankle, tibia just below the knee, cracked my hip and tore the PCL and ACL in my knee, now it just pretty much hurts all the time. By the end of a half day of deer hunting I'm done.
Check the sports med bit though medical docs seem kinda stumped when they can't see anything broken.