why now?

my foot is still killing me, i am so frustrated. i have been working so hard to get my body and mind in sink. now that i know what i can do, my determination just isn't enough. it is like my body just wants to shut down. i keep thinking that the pain will go away, but it doesn't. i wonder how my peg leg will work on the treadmill after i cut my foot off?
why now?? after i have come so far am i falling apart. it isn't the first week anymore. my body had better catch up before my mind goes crazy