First......thrush is awful and I am so sorry you are dealing with it. We had it.....dd in mouth and me only in one breast. I have tons of advice on this subject so please feel free to ask
The vinegar wash I used is 1 part white vinegar to 9 parts water. You replace it daily. I bought a plastic squeeze bottle with a pop-up top for ease of use on nipples. I applied it after every feeding and whenever I leaked and noticed. I changed pads all the time, added vinegar to the wash, and treated anything that had touched breastmilk with the vinegar wash. Also, I used OTC monistat 7 yeast treatment on my nipples after the vinegar. Any that was left visible I wiped off before feeding dd the next time.
Make sure that you treat your dc for the entire time you treat yourself. I needed the Diflucan because my infection spread to my milk ducts (deep, sharp, burning, stabbing pains that were so intense I had to scream into my pillow)......my INS covered it....it is expensive. Hopefully if you are careful now it won't get that bad.
Good luck and please let me know if I can be of any more help!