Hi Jeffery,
I am so sorry to hear that this is happening to you.
I hope you do as Josephine suggested and seek some second opinions.
However, if you should have the amputation, all is not lost. I have a son who had an above-knee amputation 10 years ago, when he was just 30. He's made a good recovery. He walks well on his prosthesis and doesn't need a stick or any other walking aid. He drives and is totally independent. Just to look at him, no-one would know about his artificial leg.
All the best, my friend!
Caryl