su, haven't seen any other threads but willsurvivethis gives good advice
I kinda have this too, to a lesser extent
some people can rush out the door, leaving the kitchen in a tip after breakfast, for example. I will make myself late for work/social occasions before I allow this to happen
I don't think the feelings you have are unreasonable, if kept within a safe level (those lovely boys of yours must keep you constantly on the go )
when they intrude on your feeling of well-being, that isn't a safe level
would it help to say to yourself, I will leave the living room tidy but allow yourslf to "save" other rooms for when you get back ?
not taking your child to school because of your anxiety is pretty serious (I know foundation stage not that profound, but can be a slippery slope I guess you are worrying about...)
I have no idea if you are getting any help whatsover, especially if DP struggles to "get it" (not a regular visitor here), but do you have anyone in RL who understands ?