Right knee Patello -femoral dysfunction

basically, my knee is sitting off centre from where it should be. The physio basically strapped it and gave me a side step exercise plus strapped it. Then I go back next week to see how its going. He said it's very possible that this is an old injury that I've had for a while and not known about it and now it's flared and gotten worse. I may have heard this wrong but I think he may have said he wants to check how I'm walking and make sure I'm not flat-footed. how that affects knee Patello -femoral dysfunction. I may have stuffed up when I answered the age-old question from 0-100% what are your chances of returning to work. I said 75-80% but my knee still feels very tight. I have to go back next Monday so it may change then. To be honest, though I'm just waiting to see if I get through until Friday. Currently, I'm meant to be doing full hrs (25) with light duties. Basically, the best way to describe the current condition of my knee is very tight with the occasional pain in the knee. Currently on painkillers. Questions: Is it possible the strapping holding the knee in place could be making it feel worse? Could going to work while going through this injury on full hrs potentially aggravate it? Has anyone been through this kind of injury before? How did it go?