Oh I am dealing with this at the moment too. My Lactation Consultant told me to wash my nipples in water and bi carb soda- 500ml lukewarm water with 2 teaspoons bi carb. Dry well. Unfortunately, I am having pain in nipple and breast- I take Nurofen at night to help me sleep and because I find painful night feeding a little harder to deal with than painful day feeding.
I am also taking Diflucon orally. Can be bought over the counter. There is some good info here Thrush in Lactation
Good luck!