Okay - I'm admit this - it's really disgusting!
I've had it too and tried all of the above. They even made me take an aids test because it was so persistant. One of my son's had it so bad as an infant they finally told me to stick part of a clortrimazole tablet in a nipple and get him to suck on it. (yes, the v*****l inserts! - yes it even says not to take by mouth on the box) It worked so quickly. Ever since then if I get it I crush a tablet and rub a small portion of it on my tongue. Works like a charm.
Also - cut sugar out of your diet while you have thrush - it really aggravates it.