I'm not ready for teeth!

So I just got an email - one of my weekly newsletters on my babies' development - about Patrick and his teeth. No, he doesn't have them yet, but he's a regular drool-monster and the email says they'll be coming any time. And then I realized, Patrick is rapidly moving out of the 'infant' zone, and he hasn't been a 'newborn' for weeks. It's all happening so fast! Before I know it my baby boy is going to be a toddler like his sis. How is this happening? Karol didn't grow up this fast! I guess since I have to split my attention 2 ways now, they both grow up twice as fast :( Or maybe it's just a sign we need another baby already...