I know this must sound trivial but it's ruined my sleep so I've probably lost any sense of proportionality.
I've been stupid. ExH was helpful with an admin task (for my benefit). He got a form, filled in his part, gave to me. I misplaced the bloody thing. Didn't tell him as thought I'd find it. But have searched high and low and can't.
There are no consequences of the delay yet but I'm going to have to own up. Wish I'd told him straight away. I've let him believe it's done which is basically lying. I've buried my head in the sand like an idiot. What is a normal amount of worry?