My Partial Knee Replacement I Had 8 Weeks Ago Is Still Causing Considerable Pain On Walking.any Advice?

The operation seemed a success at first although i had difficulty with pain control.After three weeks the pain on walking got worse although the exrays did not show anythig wrong. I am now having to use crutches and a wheelchair as it is so bad.the surgeon is going to do an exploritory operation in a months time.As I have gone private I feel this is a long time to wait as apart from the pain I am woried about causing any more damage while using it. Has anyone any advice?