Girls, has anyone ever encountered thrush in babies? I just found it o…

Girls, has anyone ever encountered thrush in babies? I just found it out when she was crying, yellow pouch, I think it's from thrush on the side. It hurts her, she sucks poorly, and wakes up from this pain... now I'll show the baby doctor at the hospital as soon as she arrives, but I'm so worried about how she will feed ? She wants to suckle but it hurts and jerks, so sad. Help with advice you know