I'm a school teacher on half term. On Monday I slept until 12pm, yesterday 10:30am and today 11:30am. It's the first time in months I've not set an alarm (I have 2 toddlers so weekend lie-ins are not an option). Is this just me catching up on a bit if sleep debt or should I be concerned?! (I do have a slight vitamin D deficiency but have been taking supplements for a while now so that should be improving). I've never slept like this before!!