sounds like you have the timer turned on by accident...if you open the camera app, along the top there are icons for different camera settings. The timer one is the circle one with a single clock hand inside. if you click on that timer icon, it will open up the timer options....the first one without a number on it is to shut the timer off. Then you have a 2 second, 5 second and 10 second option. So just make sure you select the first one that doesn't have a number on it, and that is to turn the camera timer off.
Hope this helps!