I keep starting what I think are going to be fairly silly, light-hearted stories and then four paragraphs in they go sideways and serious on me. It's a little disconcerting.

But hey, I'm writing! And the deadline's not for another month!
It's some kind of syndrome, that's for sure.

But I keep repeating to myself, "hey, I'm actually writing! worry about it later," and that seems to help.