I know how you feel - Ive only had candida for as far as Ive known, one year, and yet at it's worst I often feel depressed for days on end and sometimes suicidal. The worst is that people don't understand that its a problem, they seem to think its 'all in our heads'... and then they think were just being difficult when we cant eat whats on the menu.
We can only hope that someone is working on a permanent cure for this monster, until then you just have to remember that your not alone.