John, so pleased that all has gone well with your Knee Replacement.
Don't try to be a Hero, use the Pain Med's as prescribed.
I had my Knee Replaced just over 12 months ago.
In Australia, they had me up walking, with a Physio and a Frame, the day after Surgery. On day 4 they Discharged me from the Hospital and sent me to a Rehabilitation Facility as prearranged.
I spent two weeks in the Rehabilitation Facility.
They have Specialist Rehabilitation Physicians, Physiotherapists, Occupational Therapists, and specialized equipment for Movement, Mobility, and Exercise for Strength, Movement and balance.
They have specific performance criteria, that you have to achieve, before they will discharge you.
Then they also offer a Day Patient Program, they have a Patient Transport to collect and return you to your home, if you have no one to drive you.
While you are an In Patient, they take care of your Pain Management, so that you can do the necessary exercises, then once you are discharged and a Day Patient, your Family Doctor looks after your Pain Management.
I mentioned earlier not to be a Hero, as you will make fast, and sustained progress, under the effects of the Pain Management, whereas without it, the pain and discomfort will naturally inhibit and perhaps prolong your recovery.
For me 12 month on, I am still getting some slight discomfort / pain, and I do not have full movement.
But I do have a Stable Knee, that I can walk without assistance, or aids, I can spend most of the day, standing in front of my Lathe, so I am doing very well.
I would recommend that you see about undertaking a Rehabilitation Program, if one is reasonably available.
Kind regards and keep well,
Brian.