Solids and constipation (help)

My baby started with oatmeal and she did well. We later introduced carrots for a week straight and she did well. We would give carrots once a day and 4 little teaspooons of it. The week after we decided to give her pumpkin purées beech nut organics. We noticed that it got her constipated and she hasn’t had a good poop in a week. She poops but like play doh and she’s seems to push and nothing comes out. What can I give her to make her poop regularly again? She’s mostly breastfeed and has 1-2 bottles of formula to supplement.