PS: ICING is critical after walks, as well as after PT / Exercises... And helps control swelling which controls pain ...so if you're not icing or if you're not icing after each of these kind of sessions that could directly be the reason why you are still experiencing major pain.

( Typically icing duration 8 - 12 minutes, never on direct skin, via ice packs or cold gel packs that most favorably are surrounding entire knee...wrapped in a large towel completely around all sides of knee 😇)