Please help.

Baby is currently 3 weeks and normally she poops about 3 times a day. Today she only pooped once.

I think she might be struggling because she’ll start squinting and it looks like she’s pushing and makes this squealing sound and nothing.

She bunches into a little ball when she does this.

She’s been doing this all day so I’m pretty worried she might be backed up.

We are supplementing and were using a supplementation formula but now that I have WIC we started her on Enfamil Newborn.

Should I be concerned?