Backlight issue come on and off.

Helotes everyone, I hope my question makes sense. Ok so 2 weeks ago I had my phone on my bed I was moving a few things and a glass perfume hit the screen leaving a small crack. Nothing too bad. Well then the next day there was a purple and green line running from the top to the bottom of my phone screen. The part where the purfume hit turned into a small black circle. Ok well the issue now my phone started to get dimmer and then my phone turns black and I can still hear it and it rings too but no image. Unless I keep clicking home or the power on button the light will come back and then turn off again. What's going on what should I do?