Hello Jacki,
How are you doing? I just saw your post. Actually I am an Orthopaedic surgeon in Chennai, India. I understand your predicament about having a knee replacement in middle age. Well, if you are in constant pain and other treatments don't work, then knee replacement is the only option.
There is now new hope for young and middle aged patients requiring a knee replacement. I have introduced the Oxinium knee implant in Chennai, India. This has been successfully implanted in the knee of a 34 year old Dutch patient.
good luck