Can't sleep

It's 1:55am on a Wednesday morning and I've attempted to sleep to no avail.

Perhaps it is because of concern about one of our cats and his respiratory problems, perhaps it's due to the lovely new addition to the household, who has the habit of waking you with claws that require extraction from your skin, perhaps it's the big project I have to have bedded down at work before the end of the week. Or perhaps it's the coffee I had before bed.

My mind needs an off switch tonight.