Oh, it sounds like you are really struggling right now. All the depression, frustration, anxiety... I've been there, too. I don't think that there is any connection between the fibro and the candida, necessarily. I just have both.
Have you done any detoxing? That really helped me to clear things up. It's only one step, of course, but a very important one.
I think that the emotional struggles were due to the candida, as prior treatment cleared that up. The fibro has been there all along, whether depression, anxiety, etc. was there or not.
The fatigue is also different. With candida, it was like a drugged feeling, like I couldn't wake up all the way, and I was tired all the time.
With fibro, there are good days and bad days. If I do too much on a good day, I can bring on a bad day. Also it is closely related to sleep- I am really noticing that, now!