I don't mean to be rude or disrespectful, but unless you stop accepting being ill as a blessing, we may have a hard time helping you. I do not believe God, Allah or any other kind and loving Being put any of us on the earth to have sickness nor do they wish us to have illness. Nor do I believe that sickness is any kind of blessing.
A blessing is not something that I would look upon as wanting to be rid of. Illness on the other hand is inimical to life itself and is something we should all wish to be rid of as soon as possible and no matter what it takes.
I suspect that there are toxins at work somewhere at the core of your illness - and so continued cleansing and metal chelation with something like Metal Magic would be recommendations to try. And, though it is a metal, I would seriously consider some colloidal gold to help with mental sharpness and mood.