Hi dominos123. I think I can see what you mean about how even when you used to eat more sugary foods, you didn't used to have this problem, so why now? One thing I see is that there is something that has changed between then and now: specifically, your body has been through quite an ordeal. I might even say, not just an ordeal but a series of traumas. Maybe an original infection was one trauma, and then on top of that all the treatments, which as you pointed out were obviously very rough.
So back to the question of diet, and what that has to do with anything: I've heard that people who have suffered severe burns need a whole lot of extra nutrition in order to heal. The normal requirements don't apply anymore because of the extreme repair that their bodies have to do.
Well, I think your body has been through something like that. Almost like you are a burn victim, your body is fighting a very serious battle on your own because, despite all that modern science knows about our bodies, this is one area where no one seems to have a lot of help to offer, as you have experienced.
So your body is out there on the battle field, fighting this all alone. One of the few tools you can offer is perfect 5-star nutrition --- only the best and plenty of it. You've already made a lot of changes, and I hear you when you say you are ready to try anything to beat this. I really don't know what is going on, and I don't know if improving your nutrition even more as @gardeningjunkie suggests will gain you any ground, but I hope it does.

I didn't have major health issues before middle age. I could pack a carry bag, get a eurail pass and jump on trains throughout europe without carrying any meds, not even asprin, or having to think about any of my physical contacts because of the Allergic Contact Dermatitis, ACD I would develop and eat and drink whatever I wanted. I think the toxic overloads we face from our foods and environment finally overstress our bodies. Plus ome of us are genetically weaker then others.
At age 50 my health went haywire, I got Adult Leukemia, aka Chronic Lymphocytic Leukemia and began my battle with eczema. My body was inflamed with raging histatamines.
Today I a one of the less then 1% for who this chronic form of leukemia vanished without any treatment, no trace now for 8 years. Also all 3 form of my eczema are under control because of testing I know what contacts to avoid and I am vigilant. The inflamation in my vagina and vulva is gone and healing and rebuilding of the vaginal membranes has been successful. Trust me this has been a battle and my husband has hung in there and now at almost 75, yes that's old, I don't mind some arthritis and knees that are failing- these issues aren't even in the same catagory of pain as the eczema and vaginal inflamation.