Nipple pain

My baby (19 weeks) usually sleeps at least until 4am. I pumped at 1 thinking I was good. He woke up right as I finished at 1:15. I was walking to the kitchen to put the milk away, and I saw him watching me. He's now breastfeeding, since I know babies can get more out overall. But damn. I just pumped followed by a snack/feeding. They hurt. I keep getting little nerve pains through my nipple and breast 😩