Yeast infection

So last week I found out I had a yeast infection, which is very common to get when your pregnant. My doctor gave me cream to insert. I used it for 3 days but felt like it wasn't helping, so she called me in a pill that you only have to take once. Well I took the pill and I'm still using the cream as well and I feel like it's not getting any better. And it's so frustrating and makes me feel gross. I'm constantly changing my pad, and taking a shower. Does anyone know anything that might help? I've been staying away from yeast, and wearing light colored cotton underwear. I'm 38 weeks today and just ready for it to be gone.