Knocked my phone and now has lines.

Hello all.

I knocked my phone earlier today (About 45 minutes ago as I am writing this)

The phone now no longer works in the traditionally sense. I was listening to music at the time it happened so I could still hear music until I unplugged my headphones. The phone however doesn't turn on at all. It comes up with a faint small green line spanning all the way down the phone. When I turn it on after a few minutes it turns grey's for a second before dulling out into a black screen. I have no clue what is going on and I would like to be able to fix it. It is an iPhone5c that I have had for a number of years and if possible I would like to keep it. Is there a possible fix?

- Thanks for taking the time to read my issue.