My fourteen month old is going through some crazy sleeping cycles. He is in that period of losing his morning nap, but really not wanting to let go of it. So some days see no naps and extreme over-tiredness (cranky). Plus he has been congested and snotty which makes for poor sleeping. And on top of that... the kid has never been a good sleeper. These past few weeks we've been back to waking up three or four times per night to rock him back to sleep... just like when he was a newborn.
Parenting... it never stops.