Good evening. Girls with babies who are on breastfeeding + formula, ho…

Good evening. Girls with babies who are on breastfeeding + formula, how often do they go to the toilet in a big way? We have a real mess with this problem. I never thought that this topic would affect us, as everything was straight forward on breastfeeding, clear and constant. And then, after two days, such tight bowel movements, sorry. And with such efforts, the process itself happens. Drinking water, breast feeding. Maybe exclude porridge for now? I don't know what to do anymore.. Could teeth be affecting it?