Freelancing is a very strange beast.
One moment it's all 'OH MY GOD, I HAVE NO WORK. I must have annoyed everyone and screwed up a job (even though it all seemed to go well). I'm going to default on the mortgage, get evicted and end up sleeping face down on some cardboard.'
Then wham! Work starts flooding in and before you know it, you're doing your third 15 hour day in a row. And then you remember that the reason you had no work was because it's a slow time of year - summer events are over and the autumn schedule hasn't really kicked in yet.
Note to self - Don't panic, be more positive.