I just cannot believe that you had to go through all of this misdiagnosis, treatment etc., etc.! There is simply no excuse for what you are going through!
I am 83 years old and was diagnosed with metastatic prostate cancer 12 years ago as a patient at Mayo clinic. As a result of being properly diagnosed and treated over the past 12 years, I have been blessed with pretty much a normal life. I realize that the battle is far from over and that there will be difficult days ahead.
My prayers go up to you in the battles you will be facing. just try to hang in there and put your trust in God!