Cluster feeding?

My newborn is 2.5 weeks old, and is all the sudden having a bad day nursing. Usually, she’s a champ nursing. She’ll typically nurse for 10-25 minutes total and come off on her own. Today, she will wake from a nap fussy, cry trying to latch, latch for a minute or two and nurse, and then unlatch. She’ll repeat this cycle for 5 or maybe 10 minutes and then just want to be held and fall back asleep. She will do this a few times over 2 hours and then take longer 3 hour ish nap.

Is this normal? I think she might just be cluster feeding, but this is the first baby I’ve nursed. She had really low weight her first week so we had to supplement, so her not latching well suddenly makes me nervous she isn’t getting enough. I am pumping when she doesn’t nurse for a good period, and my supply hasn’t dropped. I typically get between 2-5 ounces when I pump.