Sometimes changing the mindset in a simple way could make a world of difference:
Instead of thinking:
"Why me? What did I do to deserve all of this agony?"
Try thinking:
"If I am this sick, then something absolutely spectacular must be coming my way."
It will all make sense.
It is all for a reason.
Karma works both ways - so instead of thinking of this as a punishment for something in my past, I am going to think of it as a sign that my life will have even more happiness and even more love than I can even imagine.