I don't know what to suggest, MrsS, but I'd say you need to do some more digging to find out if it's just a fleeting unhappiness, or something more fundamental. I was never bothered by boarding (and I was termly not weekly), but I never had a close-close relationship with DM (well, we're close, but I have never relied on her emotionally).
Hi Crem. Sorry you are struggling.
Sick note sounds best.
Good luck to DD, BTM! Fingers tightly crossed she gets a good place for next year.
MI, you do realise your Hotter catalogue signals the start of an avalanche of "demographically targeted" post? Expect Damart, Pure Collection, Chums (of course) and a whole host of other stuff to pile onto your doormat soon, all guaranteed to send you screaming into the nearest branch of Top Shop. 
Here, DH is on a mission to find out what we spend our money on, and why we never seem to have any spare. I watched nervously as he compiled a giant pie-chart of last year's spending, and was relieved to see that "clothing" came a respectable distance behind "mortgage", "food" and "home improvements". #offthehhook 