Congratulations on getting the surgery date confirmed. Not long to wait now!
Understand that anxiety but I think you are doing the right thing in view of the valgus deformity. The main problem I think is the stairs and you have a stairlift don't you? I certainly couldn't manage my stairs with both knees operated on. Hopefully your already operated leg will be strong enough for level walking and rehab. You seem to be doing really well after your first surgery.But I am also very nervous, particularly about how I’m going to cope with both legs being weak and sore, and