Ostio arthtitis

I have had x7 joint replacements already which are x2 full knee joints,x4 knuckle joints (two on each hand) x1total hip,also i have screws in one shoulder after an operation to relieve pressure on it.I am due for another opp in six weeks to have a tendon repaired in my other shoulder.I am 56 years old and im an HGV Driver.a am finding it increasingly difficult to perform by daily tasks,the aches and pains are getting worse.I am taking Codeine and paraceatomol pain relief at th moment.