Thanks Wants2Fly for your advice. However I have actually only felt sad for the past couple of days, and to be diagnosed with depression you need to have felt like that for at least two weeks. It's the lack of motivation that worries me. I'm finding it very difficult to do the homework set because I can't concentrate on it, but I put that down to lack of food, but making something requires going upstairs and making it, and I'd have to wash my plates first and then wash up, and I don't want to meet any of my flatmates...

Those sound just totally stupid reasons, I know...