Monthly Vaginal Infections

My husband & I are month 4 of TTC. ust wondering if anybody else has ever had a similar issue as this.. For the past 11 months I have had yeast infection-like symptoms every month after my period. Urgent care visit said cultures were normal and treated it as a bacterial infection. OBGYN said some people are prone but never did a exam herself. I only use cotton undies, cotton pads, and never use scented soaps or duches. Any tips or advice?