My iPhone 4s won't let me swipe to unlock?

I've been trying to swipe and unlock my iPhone 4s (iOS 7) for a while now, and it's not reacting! And when I hold the power button to turn it off, it won't let me swipe either. I am receiving notifications and I can even still slide up that tab that allows you to adjust the brightness etc…
Has anyone ever had this problem themselves?

Best if you check with a technician

Im having that exact problem. Sucks