Its the only thing you can do , get on with it and enjoy life however you can.
I can only imagine you must feel with your problems, me knee replaced both, shoulders replaced , left one twice should have had the right one replaced again 3 years ago , but circumstances have delayed it, hopefully it will be done in next few months. kidney cancer 3years ago and now have another problem with my stomach , had loads of tests 2 different scans and they think its the bile duct or something else ,name to difficult to remember . But life is here to be enjoyed however you can, get on and do what you