I am very sorry that you're experiencing such devastating health issues. I understand that feeling of just wanting to throw in the towel, and I struggled with that option, myself.
I have a dear friend who has been challenged with candida for decades. Doctors refused to acknowledge that it even existed, much less guide him on how to manage the dreadful symptoms. One thing that he found very helpful was a whole-self alteration that took many, many years. There is no such thing as a "One-and-Done" approach to this condition. It's more of a process of elimination - he cut things out of his diet, to begin. For him, even fruits and vegetables that were high in sugar content were out. This was no easy task, either - it took YEARS for him to sort most of this out.
Then, he began adding one supplement at a time. Sometimes, he would reduce one while adding another, or add a new one and eliminate another. Again, this took time and personal dedication. And, it didn't happen because any medical doctor guided him, either. He consulted a number of holistic practitioners, and they each had something positive to add, even if none of them agreed on one single approach.
THEN.......he began to add colloidal silver to his regime. Now, it's very, very important to understand that colloidal silver is a wonderous thing, but it can also backfire. So, care, caution, and attention to details are of vital importance.
Finally, explore your spiritual and emotional needs. Nearly every condition that wasn't created by some catastrophic injury is a whole-self endeavor - even recovery from a catastrophic event is a "Whole-Self" effort. Mind, body, spirit.......they all work, together, for the benefit of the whole organism. Whatever works for you to bring you calm balance, courage, and reslove.
Brightest blessings to you - you are far too important to exit this earthly world untimely.