the oral canesten thrush pill should sort it out-you only need one tablet. Symptons should clear in a few days-however you may need another one a week later-best to see your GP who can precribe you a course of these anti fungal tablets
As Nohorn says-avoid anything yeasty-such as beers, malt drinks, alcohol, bread, (have pitta which doesnt contain yeast-or unleavened bread), avoid marmites
Drink lots of water and take acidophillus supplements (freindly bacteria), natural youghurt 'down there' is also soothing, eat it too, and the canesten cream also works well.