Injured the leg I had a Knee Replacement on

Hello, my knee/ leg experience is a little different than most posts here. I’m 69 and had a successful TKR 2 years ago. The operation was so successful that I thought I could conquer anything . Unfortunately I went on a longer hike than usual one day on a trail I was not familiar with about 6 months ago. Immediately, I knew I had done something as I could feel pain on the inside of my knee. I have had a stiff knee since then and more bothersome is that the bottom of my foot feels numb all the time. I have had ongoing tests( ultrasound, x rays) and am waiting to have an MRI. From my online research, I keep coming back to the INFRAPATELLAR SAPHENOUS NERVE PAIN which can show up as numbness in the foot and the outside of the knee which I have. It is also sometimes misdiagnosed as per anserine bursitis, which showed up on one of my ultrasounds and then disappeared.
Has anyone else had a similar experience to me? I would love to hear about it. I also have bone on bone in my other knee and am worried that if I should have another TKR and it is not successful, my mobility will be very limited. Thank you for any information I can get!