Oh the joys of recovery....walk too much, things complain....sit too much, things complain....
Things just seem tighten up in a matter of hours.
I can imagine the restricted weight bearing issue adds to it.
I just had to remind myself often -
Tightness is a normal occurrence after this kind of major surgery. Your surgeon did major carpentry work and disturbed every millimeter of soft tissue in this area. You're tight because your tissue is healing... If a long full step right now is causing pain and limping, don't take long full steps. Take smaller steps. Take a short walk several times a day, instead of longer walks. Use your cane. Use ice. Rest a lot.
This isn't the time to do anything to excess. Baby steps now, and lots of patience, pays off big time later. Recovering from self-induced tendinitis can end up taking weeks or months. Consider yourself as still recovering from surgery and structure your return to your life as a slow, gradual process where you introduce very small increments in activity, and then give yourself time to see how you react to it.
All temporary, and worth the patience. I am certainly glad I am able to get back to a full happy life