My 3 week old hasn't pooped in over 24 hours...

Jilybean17

Is this normal at this age? I thought it wasn't considered normal until after 6-8 weeks to go longer periods of time without pooping. Shouldn't she have 3-4 dirty diapers in 24 hours? She is pretty gassy and it has a really strong smell, so I keep thinking she is going to poop, but then she doesn't. 

She is having plenty of wet diapers so I think my supply is ok, but going this long without pooping makes me think something is up. WDYT?