I have heard that a tampon quickly dipped in vinegar and than inserted for and hour or so can help. I don't know how it would affect your fertile time though.
Yes I tried this and it was wonderful. I got thrush mid last cycle because of all the semen (which is alkaline) that I was trying to get to find the egg. It changes the Ph. I dipped a tampon in white vinegar and teatree oil and inserted it and it was wonderfully relieving. Also sat in a bath of vinegar and tea tree oil was great. And sea water is good so go to the beach. Plus I got onto it as soon as I felt it coming in. Also used difulcan one which worked after 1 day, but the tampon helped until that kicked it.