Help! Yeast infection! What do you use BEFORE ovulation to treat a yeast infection?

Michelle • 30. Married. TTC baby #1 since Sep 2014. Miscarriage in March 2015 and CP in Nov 2015. Waiting for my rainbow...
I need to prevent a yeast infection before I ovulate, but I don't want make the environment not sperm friendly. Any tips would be much appreciated! 

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