Ive been told that there are lots of retraining of muscles etc after a re alignment. The suggestion about supportive shoes may be a part of that if you eventually want to be wearing other shoes. I know I walk differently barefoot and in no supportive shoes as my arch goes flat and pulls knee inward.

So many things involved. Best to you.

You said, "Surgeon just wants to send me to another Dr. for the feet, back and hip as he's done his part and x-rays look fine." Well, that is true he replaced you knee and it has healed - so his part is over.
The next step, which you have clearly done, is what I call the typical "this is what we do after surgery" PT clinic. At those clinics, you are typically seen once or twice by a PT, then turned over to a PTA (PT Assistant) for your therapy. Fine for the person with the totally uncomplicated recovery, but maybe not enough for you.

How often do you have PT appointments now? What are they doing with you? May I ask how often you are doing your full PT exercise routine at home?

If you are faithfully doing your PT daily, not progressing and are still in pain, maybe it is time to ask for a referral for complete evaluation of you gait, stride, posture, muscle tone.. by a doctor of Physical Therapy? (PTD) These are often found associated with a comprehensive rehab center, ortho hospital or the like.

They will advise you if you need to see a different doc(s) for your issues, and help design a custom program for you.

Here's the tough part - PT HURTS. PT is BORING. Without PT Nothing will get better. It needs to be done both in clinic and every single day at home. You are trying to get muscles and ligaments to do things they may not have done for years, and to overcome the stiffness that came before and as a result of surgery. But without PT, everything that hurts now will continue to hurt, and make everything connected to that body part, even remotely, hurt too. Pretty soon you are a big ball of OUCH. After my fifth hip replacement surgery, that is exacly where I was. It took almost 6 months of daily exercise - half on land, half in a pool, to get back to normal. I even carried a yoga mat and my bands and did PT on hotle room floors when we travelled.
Sorry to carry this message, but it is the way out of your misery.
Sue