What came first the crazy or the kids?

I found myself lying awake the other night sniffling, then laughing, then pondering, and finally sleeping. It all started with a simple question I asked myself: "How old will Christin be when Lindsey is her age now?" "7" I answered (this is where I start to loose it) The train of thought that followed was this: 7?!?! That's halfway to 14! 14's only 4 years away from 18! Oh my gosh where is the time going my baby is almost ready to move out!!! Then I started to cry. After a few minutes of tears I realized I actually was crazy. I think I've known it for some time now but I finally admitted it out loud (it kind of felt good). That made me laugh. I thought about waking up George to tell him what a nutcase I am but then I realized he probably already knows and if he doesn't who am I to ruin his perception of me.
So this revelation (the fact that I actually am crazy) led me to ponder another question: What came first the crazy or the kids? I'm fairly certain I am not the only crazy mom out there, frankly because I know a lot of them and well ya know. And let me make myself clear: I'm not talking about hormones, I'm not talking about when a mom is pmsing or pregnant or had a really crappy day. That's a whole different story. I'm talking about middle of the cycle, "normal" life crazy. I know I became this way sometime around the birth of Christin but I'm wondering, did Christin make me crazy or was my very first act of craziness when I said "I'm ready to have a baby."? Since that moment there have been other acts of craziness (like when I said "I think we should have another one") Or when I find myself smelling my children to decide if I have to give them a bath or if it can wait one (or two or three) more nights (I gave serious consideration to deleting that but what fun is a blog if it's not honest?).
So tell me moms, what crazy thoughts have you had? What ridiculous things have had you in tears in the middle of the night?