I know its only supposed to get you some sort of response within 24 hours. Its just, with all the stupid little things that had to be explained, the longer I wait the more terrified that they are gonna be unsatisfied with what I have provided. I honestly don't know if I will survive the weekend. I know that sounds over dramatic but I don't know how I am going to cope if I don't hear something. That's why I opted for Thursday appt not a Friday one.
You should get the decision within 24 hours, but it really does mean 24 hours. You were never going to hear anything from them yesterday, so there was no need for you to worry or not sleep last night.
And as larrabee said, sometimes they don't manage to process it within 24 hours. You should hear back by the end of today, but be prepared that you may not.
If you don't, DON'T WORRY. It's nothing to do with your application... they just aren't always very good with sticking to the 24 hours. Since it's the end of the week, you may actually find you don't hear anything until early next week.
All you can do right now is forget about it as much as you can, and distract yourself by doing other things. Like larrabee suggested, get out and go for a walk or something, or go shopping, go to the cinema... just find something to take your mind off it for a while.