Nipple soreness and discharge?

Ellie • Mommy to a baby boy💖

So Ive stopped pumping about a week ago because my milk supply was very low but since last night my right nipple has be very sore, pink/red & has a yellow discharge.

This is a pic of the discharge on a nursing pad.

I went to my OB today but she said its fine, i dont think its fine though because why would one nipple be so sore but the other one isnt when I haven’t pumped for a week?