Dropped my phone and now I see almost-transparent lines on my lock screen and the touch screen doesn't work. Help?

I was walking to my garage when my iPhone slipped out of my hand and fell on the floor. I looked at it and saw strange almost-transparent lines on my lock screen. I tried to unlock my phone, but it wouldn’t let me do anything. It was almost as the touch screen wasn’t working. I turned it off and plugged in my phone to the charger and it started up automatically, but it still looked the same and wouldn’t work. I think that my iPhone 5 might be broken? Please help!