Sorry you are in pain. Think of it as a stage in your recovery.
From my own experience, I find it is easy to overdo (especially if you have been active) and even more significant, it is very easy to strain, sprain, and even tear the soft tissue in the “bad” leg and in the “good” leg. Super sensitive to twisting of any sort!
I sprained the ligament on the inside of the “good” knee and it is a slow process for it to heal, stop hurting, and re-gain strength. I was told to rest it for 5 days, then very very slowly begin using it again, wearing a stretchy brace with straps (no stays—those are usually for tears, I was told). Then, when I felt like it wasn’t going to give out, start slowly walking in a pool.
I have done all this. Still am doing it. The slow walking in the pool has really helped.
It is finally feeling like it is healing. I’m 2 1/2 months past the diagnosis of the sprained ligament. Told it would probably take 5 to recover.
Sprains happen. You will recover.