4 months old baby, 3 days not pooping

Normal pa ba na hindi nagpu poop si baby? 3 days na today, umuutot naman, amoy egg. Mixed feeding po, bottlefed (breastmilk) / breastfed. Ni massage ko na tummy, tummy time ginagawa everyday din. Pupunta naman ng Pedia tomorrow, need ko lang malaman additional info/ same experience, ano mga ginawa niyo. Thank you!