Phone screen starting loosing color before turning almost all black

So I had my phone in my uniform for a band show, pulled it out after and my screen was purple, pink, and green shades with lines and mixing of regular colors. It “was” limited to mainly the bottom portion of the screen. The background was still there but it was hard to see. Within the next 12 hours my phone screen began turning black before loosing 98% of the screen. Only a blue-ish green specs around the outside are all that’s left. The touch screen works and the internals are fine, but I cant see anything on my screen. I just want answers…