How to make baby poop?

Kaitlin

It's been almost 48 hours, she's 2 and a half months old. I'm starting her on reguline formula next time she's hungry. I just want her to poop before hitting the 48 hour mark cause I feel bad and don't want her to have to go to the hospital. :( Any advice is greatly appreciated!

UPDATE: I did the thing with her legs and she pooped.