Another pregnancy related thought:
Adrian (our 4-year old) has been pretty excited about his new baby brother arriving. Three nights ago, as he was going to bed he announced, "The baby is coming tonight."
When the morning came (and no new baby with it) I was prepared for disappointment, but instead, he was just as happy as before and announced "The baby is coming today."
And two nights ago, after the day gone by with no baby... Again, no disappointment, just a confident announcement: "The baby is coming tonight." (As I'm writing this it's the next morning and still no baby.)
Shouldn't our attitude be similar when we think of the return of Jesus? He's coming and we're confident of that, but we're also resting in his timing and not disappointed if he doesn't.
He who testifies to these things says, “Surely I am coming soon.” Amen. Come, Lord Jesus!
(Revelation 22:20 ESV, emphasis mine)