My baby is on enfamil newborn due to some BF issues but we started introducing breast milk back. Her first 2 feedings this morning were breast milk but I've done formula after that but I notice it's 5:30pm and she hasn't had a poopy diaper she normally goes 5 times a day including yesterday, she's straining and turning red but my poor baby can't get anything to come out. Any suggestions?? I hate seeing her so uncomfortable and since she's backed up she's also spitting up more frequently.