I look forward to seeing better educated answers about the incident on the stairs, but I’ll share that my PT and Orthopedic people say that we can’t really do anything to damage our hardware. You might have some soft tissue aggravation, though.
This happened to me after one of my early surgeries while I couldn’t yet get full bend. I was celebrating finishing written exams with my friends, and I laughed so hard I had to kneel down or pull a muscle in my gut. My knee hurt like a son of a gun at the time, but nothing lasting. That was 30 years ago and a much less invasive surgery, but maybe the experience is still valid.
I hope your knee is okay.