Baby consipation?

Ashley • Mommy to a beautiful baby girl born May 26th! Second beautiful girl born April 30th! 💜💜 #girlmom

My one month old hasn’t pooped since 11am. It’s not 11pm. She is pushing and grunting trying to poop and it’s making her face so red because she is trying so hard. Is there anything I can do to help her? She is breast milk and formula fed.