I dont know if you have tried this before but when I was at my lowest health wise it changed my life.
I started to read the bible, but not with the intent to find my healing (like I had done so many times before). Someone advised me to read the bible with the intent to know God; in the process my heart and mind were changed a short while later I began to find things that worked to improve my health.
It is a daily walk and I am continuously amazed at the changes that take place in my life just from wanting to truly know God and to know what he desires of me. Its all there in the bible.