I feel your pain I really do. Having chronic candida yeast absolutely stinks and it's really difficult for it to go away. You sometimes have doubts about what you're doing, and if you're even treating it properly. There will be long tims where it feels like nothing is accomplished. Sadly what you are feeling is normal.
The best suggestion that I can give you is get the candida diet, detox and protocol book. It's the best solution I've seen in helping get rid of candida. You need to take the right diet, with the right supplements, and absolutely stick with it.