I'm sorry. I took my cue from what you said: "When I next woke up, the cast was gone, the agony was gone..." I guess I'm not understanding because one of the people I know who has cerebral palsy had the same surgery and cast put on from his hips down to his ankles and he seemed to weather it quite well. He never could walk so I'm not sure what it was done for. Seems to me it was to keep his feet from turning in.
Have you seen a counselor to learn to cope with your disabilities and the mental anguish you're going through? Your physical pain should be more than enough to have to bear without the mental pain.
<font color=blue>"Our doubts are traitors and make us lose the good we oft might win by fearing to attempt" --Shakespeare</font color=blue>
__________________
Psalm 119:105 Thy word is a lamp unto my feet, and a light unto my path.