It started as a slightly sore dry throat on Wednesday while I was traveling; I figured it was just dehydration, and drank a lot of water. Over the next couple days, I started coughing more and more often. Now it's every couple of minutes. And now my nose is stuffed up too, despite all manner of attempted remedies.
I'm really really hoping that this doesn't turn into another four-week-long cough, like the one I had back in March and April. Usually I only get that sick once every few years; I'll be really unhappy if it happens again now, only four months after last time.
I'm still planning on going to WorldCon. But if this gets worse rather than better in the next couple days, and especially if it keeps causing me sleep problems, I may end up cancelling.