Hi Mama Nines,
Welcome to the PTSD Forum. Bless your heart. I am sorry you have post traumatic stress. Knee surgery can be very painful. I had it done on my left knee a number of years ago, and it took an entire year for things to settle down. I still have issues from that surgery. sigh. It really sucks, doesn't it?
With the right type of help, you can get help so it doesn't turn into the D in ptsd. "Disorder" How are you doing otherwise? I sure do hope you have help at home. I live alone, so things did not go so well for me.
Take your time and look around. There are some wonderful people here.
Safenow.