I'm 12+2 and over the past week or so I've just exploded in size. I've put away most of my 'normal' clothes, save for a few bigger ones and even they are getting tight now. I'm nowhere near big enough for maternity clothes, of which I have stacks thanks to a good friend - but I can't justify getting new for just a few weeks.
I think I've just answered my own question.....it's a charity shop trawl for the next size up isn't it?!