I cracked my iPhone 6 screen?

So, basically I was at the park and my parents always tell me to put on my otter box case but I can't find one of the pieces of the case there are three pieces. There's the piece with rubber on it and two plastic pieces. So I was in the park talking to my friends sitting on a bench when all of a sudden after talking to them for 5 minutes not even moving, my phone just falls out and from a foot off the ground my phone screen just shatters! I was so angry because every time something I get breaks it's not my fault like last time! But it's too long to explain there's only 921 characters left. So, anyway, my mom happens to walk up and I show her my phone because this time it was a little on me and I admitted to my mistake and my friends told her what happened and my mom said well you could have at least put on the two plastic parts! I said that's one of the parts I was missing and she knew that I lost my case and we were supposed to buy a new one last week but something came up. Please help and thank you for reading. Also sorry for all the grammar mistakes

The warranty should cover this.

Omg that's sad but I think you can repair the screen at a store its cheeper than buying a new one

".every time something I get breaks it's not my fault like last time!"
LMAO this is the 2nd time.
My daughter did this. I got her a flip-phone replacement and told her, you want something better you buy it with your money. She has an allowance and could have bought a new one twice if she saved up. I guess she doesn't want one bad enough.

Not sure if warranty can replace the screen. You don't have anything to loose tho

Just apologize, accidents happen