Cracked and glitching iPhone screen after placing it under my pillow

last night, I put my phone and my pillow because it was cracked inside and I didn’t want it to get hard, but when I woke up in the morning Italian it is glitching and I couldn’t see anything. My phone is not working now I cannot see anything, what can I do My phone fell on the floor, so it’s a little crack on the side which is blue and all kind of colours and it had also colour inside it so last night I put it under my pillow and then after I woke up and started glitching and that I cannot see anything

[Re-Titled by Moderator]