LCD damaged or more serious?

Put my 6s down while out walking/fishing and it started sliding off a rock. When I grabbed it quickly I think I must have jammed it against the rock and caused damage.

Screen had some weird lines on it initially bit they have gone now. No cracks to the top screen. LCD looks to have bled and the colour has a distinct blue hue to it on most of the screen. 

Phone is generally playing up a little, ringer volume changing on its own. Rear camera not working, Flashlight not working. Asking Siri to turn on flashlight, give this reply that its already on. Asking turn it off, Siri says its already off!

Could this be all caused by a damaged LCD/digitizer or have is it time for a new phone?

Also, I can see a faint white line, like a crack in the top left corner. Its below the glass as the top screen is totally fine.

Cheers

Daniel