Baby slept 15 hours!?

Lauren • Had my sweet girl 02/22/20 - 5 weeks early due to rare genetic disorder💗 Had my handsome man 09/30/22 - 3 weeks early due to low birth weight💙

My daughter is 4 going on 5 months. I know it’s normal for them to sleep that much but she usually wakes up early to eat then takes a bunch of naps throughout the day.

Well I laid her down last night at 8pm and she didn’t start waking up (not even fully awake) until noon!!

I didn’t wake her because you know the whole don’t wake a sleeping baby but it scared me that she’s sick or something.

She has been teething, will that affect her sleepiness this much?