Already?

Let me start this post by saying I am not a vain person.

That said, I had a terrifying experience this morning. I went into the bathroom to wash my hands (lots of sickies around here lately, just being careful) and that's when I saw it. The dreaded gray hair.
I've been seeing a lot of them lately. During the pregnancy they started popping up like mad, I'd do a check every morning just to be sure more didn't sneak onto my head in the middle of the night. Then they kinda tapered off after the little girly got here. I assumed I was safe again.
But now it seems they are back. Springing up where I would least expect them: on my thirtysomething head.
Why? I wonder, thinking back to my mothers golden locks when I was a kid. My dad started sprouting them on his temples in his late 40's and that's still where they currently reside. They're both a little lighter these days, but they're both over 50!
Maybe it's the kids? I was warned by several family members (ok, my mom & Gigi) that the birth of my daughter would carry on our female tradition of teenage torture. Then there is Rex, I really don't think I need to say more there. And Nate is on the fast track to adolescence, complete with all areas of awkwardness.
Could it be Todd? I doubt it. He's been driving me crazy in the same ways for the last several years of my life. If it was him I'd be completely gray already. Maybe even bald.
Perhaps it's money? Christmas, hospital bills, new mouth to feed, old mouths to fix, a vacation I am desperately trying to convince Todd we can afford (and manage with Lucy). Our cash is going in lots of different directions these days and not nearly enough goes straight to my wallet. But it could be a lot worse, so we're grateful for what we do have. Guess I don't think it's that either.
I suppose it could be a million things or just the 1 I can't quite figure out right now. Maybe it's just how I was designed, to look like I'm 12 at 18 but go gray at 30.
Ah well, I've stressed about it long enough. Now I just need to get to Walgreens and purchase some of that stuff the chick from Square Pegs is always raving about.