Are you saying that you can't find the Camera icon? That it is not on the phone?
Try a Hard Reset. (Hold down the power button and Home button at the same time until the phone shuts down and resets.)
Otherwise, you might need to do a backup and restore.
Let's get your camera up and running! It's important to catch all those great memories. I would recommend powering your phone off and back on. If this does not help, than we will go with the previous posts suggestion of a back up and restore. Keep us posted.
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