Uy, mama, alam ko ang alalahanin mo! But this one is really best to check with your pediatrician or call them quickly, hindi kami sure kung normal lang ito or may need ng help, especially with the mixed feeding at solids na.
A few of us moms have kanya-kanyang experiences with poop schedules, kaya di talaga one-size-fits-all, pero pag 3 days na at worried ka, better safe than sorry! Tawagan lang agad ng doctor para peace of mind mo, they can give you proper advice based sa baby mo specifically. Sending love, sis!