I had similar symptoms and was only able to get better after clearing my heavy metals. (Feel free to read in more detail at www.BodyPureNow.com) Candida will be "farmed" by the body to help it absorb some of the toxic load from the metals. As long as you have toxic levels of mercury, arsenic lead etc. fighting the Candida is a losing battle (since you are fighting your own body's tendencies to support the Candida.)
Have you been tested for heavy metals?