Thrush

My baby has thrush. She's three weeks old. I took her to an urgent care and they gave her the medicine to put in her mouth, but they didn't give me anything. I was under the impression that I should be using some kind of cream on my nipples since she's breast-fed. Does anyone have any experience with this or can tell me what I can put on myself so we don't keep just passing this back-and-forth?