Evening fussing while breastfeeding

Arin
My baby will nurse regularly for about 5 minutes and then pull off and start fussing and shaking her head back and forth across my nipple. It's so frustrating!
She has been doing this off and on for a little while but I've noticed that it had gotten worse over the last two evenings. She does have plenty of wet/dirty diapers so I'm not worried about a supply issue. Maybe just slow flow in the evening? Could it be nipple confusion from a pacifier? Any similar experiences or tips will be greatly appreciated!