My iPhone 5 front and back camera isn't working?

Whenever I go into the camera or snapchat it's just a blank screen. It doesn't let me take pictures or anything. Iv tried waiting for it to come back but it still doesn't work. I broke my phone 2 weeks ago when only got it back last week and they were both working fine but now all of a sudden there stuffing up?!

Is it only snapchat? Or is it regular camera as well? The circuits could have been damaged when you broke your phone.