Yeast infections

I am so sick of getting yeast infections this pregnancy! I've never had them so bad or so often it's insane. I went to my dr and he gave me oral medicine, but a week after I ran out of it it either came back or just never fully went away. And that I used Monistat for that one and now a week and a half maybe two weeks later I have one again! I'm just wondering if anyone knows a way to get rid of it...