Despite the fact that I get very little sleep, it isn't that - I know it'll get better.

For DS, I worry that he's a bit weird and won't have friends when he's older. It's possible that he's just so cool that he seems weird from my perspective. Also, he's 4, so a certain amount of weirdness is probably to be expected.
DD.... I used to worry that being frozen for a couple of years before she was born might mean she was dumb. She isn't.