Girls, it seems my daughter is about to refuse breastfeeding ? For sev…

Girls, it seems my daughter is about to refuse breastfeeding ? For several days during feeding, she eats, then starts wriggling, sometimes with her feet, sometimes with her head, while crying. + I feel like the milk isn't coming as it used to, even though I feed her very often. My breast used to get really full before, but now it doesn't swell up like it used to. Although I press on the breast and milk comes out. What should I do?:(