Yeast infections are especially common during pregnancy because hormone changes can disrupt the pH balance of the vagina. Wash with diluted teatree oil. You may consider eating yogurt regularly if you frequently get yeast infections or are on antibiotics. Use unscented products, such as unscented pantyliners or femine wash. Breathable cotton underwear is good too. Talk to your doctor if your yeast infection doesn’t improve after using home remedies or OTC medications. You may need a prescription medication.