IPhone 6s screen cracks for no reason?

I got this iPhone for my 18th birthday not even two months ago, and it's already cracked all over. I had a screen protector on by just took it off to see f these cracks were superficial or not. I was sitting on the ground for not even 20 mins and I fell asleep. Woke up and t was cracked all over. I'm by myself. No one has been around besides my mom over two hours ago and my doors are locked so no one came in and dropped it randomly. Anyone have any ideas?

How to download apps from purchased from a year ago?

Ok so i have a iphone 8 and its new i have some apps from a year or 2 ago that i want to redownload but when i go to purchased i can't find them and i can't find them when i search for them but when i go to my purchased on mu itunes on my computer it shows up from a few years ago so how do i download it

Help me my Iphone is acting weird

So I don't know how to put this in a story. But I was playing on my phone at like 8:00 pm and suddenly apps begin to act weird. It takes like a 5 second delay until that app is opened and sometimes when I open an app it closes. So I shutted down and turn it back on my phone and the apps still do it. Buy I notice my phone was on low battery. So I charged it and it keeps going off and on. Also when i try to shut down the phone, it turns off by itself, like not in a restarting way. More like a way when you press the power button one time (not holding it) and it turns off.

Should I keep the iPhone X?

I just traded in my iPhone 7 Plus for the X. I love it's features but the size difference (in the hand) is what's making me rethink my purchase, especially where many apps are not even supporting it yet, making the screen size even smaller. Should I trade it in for the 8 Plus or keep it?

My iPhone 5c Hotspot won't work

When I turn on a iPhone Personal Hotspot it forces me off the Internet and makes me use LTE, How do I stop this from happening?

Details:

iPhone 5c (These are no longer offered updates)

iOS 10.3.3 (14G60)

Very good condition

No modifications on the iPhone, Just your average iPhone you would see.