Off ph balance and pregnant

Has anyone experienced off ph balance in pregnancy? I’m not really having much sex and if so it’s with the same partner of 8 years…. But my ph seems to be throwing its self off now that I’m pregnant. I’m wondering if there is something i can do at home or is it best to just get antibiotics from my OB. When it used to happen before i would take medicine for bv but it would always end in a yeast infection which i would have to get medicine for that then and I’m thinking it’s bv agajn but not sure about the medicine now. Any suggestions?