TMI Alert! TTC with YI

Wifey
Of course when my fertile window rolls around, I get a yeast infection.😡
 I didn't want to wait another month so we tried anyway. I was taking OPK's every day and I tested negative every day, including Wednesday around 5pm, then got a smiley face Thursday morning around 7am, and another negative Thursday around 5pm.
I'm hoping it was just a short surge and not a false positive. My YI has gotten so bad that sex is painful and DH doesn't want to try anymore this cycle because he knows it hurts me to try. So we are praying that our efforts up until now were successful.
Can I treat myself for a yeast infection during my TWW? Or will that hurt my chances of successful implantation??
I want to get a BFP sooooo badly.😩