IpadGrandma after everything you have been through this was the last thing you wanted to hear.
So sorry you have to deal with this now. I'm sure once you get those muscles around your joints strong and flexible you will be able to do much more.
If the XRay's are normal, and you are on a personal "rehab" program, why are they saying this?
I doubt your going out to run a Marathon in the next few months? Or are you ?? Just keep doing what your comfortable with, getting your fitness back.
We all are aware of the slim chance of dislocation, but we aren't daft? We are all careful knowing we have this artificial joint.
I am sure you will overcome this, you are pain free and boy that helps.
You will soon be back sorting out those cupboards.
Best wishes and Go Hipsters ?