Breastfeeding mommas

Tamara • Mommy to my 2 beautiful baby boys, Nathan Louis💙 born August 12, 2017 and Parker Joseph May 6, 2019❤️ My whole world😍

I have a white/yellow spot on my right nipple, does anyone know what this could be? Thrush?? I have no idea, but when I nurse my son at first it hurts really bad when he first starts nursing and even afterwards it hurts for a little bit randomly..not all the time