SLEEP! Not getting enough at night or naps during the day. Doesn't matter what age your DC are.
Share your stories here, solutions or just have a vent!
I'll start...
My DS is 8.5 months. Went through a good stage with night time routine, still has really - self settles to sleep no problem. Feeds at 11pm. But will wake between 2am - 5am maybe 3 times. So I'm up and down a lot during the night! He has slept through maybe a handful of times. Still good with naps, 2x 2hr.
Still would love a full night though!