Help! What’s wrong with my mouth!

[helpmeplesaseimscared]

Hi, I’m 13 years old and i recently checked out the inside of my mouth, and my tounge and cheeks weren’t looking right. I’m in tears while righting this, i’m scared and i don’t know what’s wrong. Please help. I’ve never smoked, drank, kissed anyone, nothing

 

[Gordon]

You've got a small bruise on one cheek where it looks like you've bitten it. Otherwise you're perfectly healthy.