Don't give up hope! There is an answer. We just need to keep looking to find it.
I personally think candida is not the answer. If so, topical antifungals would work or at least improve things a bit, which has not been my experience at all. I think candida may be part of the answer for some people but it is not the full answer.
Did you try the saliva gel protocol?
I have had some good improvements with this. I am not cured. Maybe 40-50% improved.