Constipation in infants. Daughter 4 months old, goes once every three …

Constipation in infants. Daughter 4 months old, goes once every three days and only with my help, on the third day she already gets fussy and pulls her feet. Massaging, attempts at lying down don't help. We introduced baby food, started going potty from broccoli, but this lasted only a week. And again constipation. Nestle formula since two months. Before that there were no problems with stool. Who has been helped?