2 week old screams when she poops

I need help. My baby girl will be 2 weeks on Tuesday. I breastfed and supplemented with formula for a week and completely switched to formula about three or four days ago since I wasn’t producing enough milk.

Now when she poops she cries and screams bloody murder until she passes all of it. Her stools aren’t hard nor watery. But I don’t think it’s normal for her to be crying that hard just to poop?

We are using similac pro sensitive because that’s what the hospital provided

I hate seeing her like that and not being able to help :/