I fear I'm "doing it wrong"

I keep finding myself trying to draw comparisons between me and other mommies I know, and between Zac and other babies, and I just keep finding reasons to tell myself I'm doing it wrong.

By all measuring sticks, I have a healthy happy baby. But I must be feeding him wrong because he's bigger, by leaps and bounds, than any other kid his age. He just started sleeping in his own space, and he still doesn't sleep through the night, I must be doing that wrong too. He's not crawling yet, let alone pulling up. Something that I'm doing in all the other things (wrong) must be contributing to that.

Why do I want so desperately to blame myself for something here? Why can't I just remember every baby is different, every Mommy and Daddy are different, and just let things develop at their own pace?

Sometimes I feel like I'm making myself nuts with trying to find the wrong things.

In Zachary news: Two teeth have broken through on the bottom, and there's a lump of one on the top, too. The bottom teeth are his secret teeth, he doesn't really like you poking at his mouth to look at them. He's starting to mimic speech patterns, and sometimes when I say "I love you" he replies "Ah yaaa yaaaaaa" very enthusiastically. He's snuggly and cuddly and entirely sweet.