What could this mean?

Erin

Hi! My son is 2.5 weeks old and the last day or so he has been latching, unlatching, pulling away with my nipple in his mouth, just very unsettled during feeds, mostly in the evenings. Could this mean my supply is low? Letdown too fast? It's very uncomfortable! I haven't pumped yet. Just use the haaku once a day and I get 2oz. Any suggestions? I'm going to take him to a place that does weighed feedings on wed, but he just had a weight check on thurs and he was gaining great so I think my supply is ok