My one week old hasn't pooped but one time since yesterday 😭 she pooped once yesterday and then none…

My one week old hasn't pooped but one time since yesterday 😭 she pooped once yesterday and then none today. I can tell she tried to earlier but still hasn't. I told her pedi and she said it was normal for them to not poop sometimes for 5-7 days?? I just don't want her to get constipated and start hurting 😫