Help! Breastfeeding question.

Sa

My baby has been sleeping longer, so I have been waking up to engorged breasts. It’s usually not an issue, she just eats when she wakes up and it’s all good. However, this morning I woke up to a slightly painful lump at the top of my engorged breast. Is this the start of a clogged duct or something? What do I do? I really want to avoid mastitis. 😬