Thanks, pegasus. I took a paracetamol, and it didn't do very much...looks like I might have to see a doctor at this rate. But I don't know how long to wait to see if it'll just go away by itself...or even if I should be waiting, because I've no idea how serious this is. All I know is I'm going to be annoying people by letting them down until this gets better on its own or I work up the courage to do something about it.