Reocurrent Utis !! Any solutions??

So about ever since I’ve started having sex I’ve been getting a uti every month/ every month and a half. It doesn’t matter how much water I drink or if I clean myself after sex. I’m currently 5 months pregnant and have had two Utis this pregnancy. Anybody had this problem before or know how to stop it? I’m tired of being on antibiotics so often and I hate having to take them when pregnant and want to avoid getting a uti atleast until after baby is born ! Help!??