I was on Diflucan for three months, everyday, straight. It did absolutely nothing for my Candida symptoms. Although I have a friend that took only one pill and claimed she was cured. So... I think it really depends on your body, and you. I can't imagine if you aren't seeing results already though that it would be something to continue wasting your money on. On the other hand, if it seems to be working, I'd keep taking it, but DEFINATELY keep taking the probiotics, Diflucan kills the Candida, but it can keep coming back, and stronger, if it's not immediately replaced by some friendly bacteria.
Good luck to you, I hope you overcome this thing, I'm sure it can't be fun.