Steve, I hate to say it but there are some folks around here that have had to have the knee replacement redone because their body was rejecting the joint. The husband of one of the women my wife is in a quilt guild with in particular. Even then they had to put a pump on his new one once for swelling, it is doing well now. The VA told my B-I-L that he didn't need his knees replaced and after one trip to an orthopedic doc after he got on medicare he was told that he needed both knees replaced because he was actually splintering the joints from them rubbing bone on bone.
I am at 10 months with mine and other than some scar tissue I am still fighting I am doing great. Hope the new Doc has some help for you without further pain. Maybe you just need to have a pump on it for a few days.
Will keep you in my prayers,
Larry