You know what? It sounds to me as if you have lost faith in your surgeon, and I don't blame you.
When he sees you in 4 months' time, if he says that he doesn't want to see you again, please ask for that in writing.
Also ask for copies of all your notes and X-Rays. You are entitled to those.
I'm thinking that you need to look for another surgeon and many surgeons won't take on another surgeon's patient until a year has passed since the surgery. They don't want to be accused of poaching another surgeon's patient.
However, if you surgeon officially signs you off, I'd say your would be free to look for a second opinion. That's when you'll need those copies of your notes and all your tests, to show to a new surgeon.
If you're looking for a new surgeon, look for one who specializes in "problem" knees. These surgeons specialise in dealing with knees that have proved difficult for the original surgeon to fix.
You'll need a surgeon who has no connection, either social or professional, with your current surgeon so that he/she can look at your knee with new eyes and form an independent opinion.