I so feel your pain! I was a high school and college athlete and have blown out both knees multiple times. I have had a total of 9 knee surgeries. I understand what you are going through. But I have learned this: the more active you stay the better you will feel. I thought that redicalous when I heard it because increased exercised caused me pain. But after a couple of weeks you know what? I started to feel much better.
You will definitely find compassion here