My new bottom braces are cutting my inner cheek every time I try to bite.?

The problem isn’t because the braces are sharp, im already used to that. The problem is my inner cheek is being pinched really badly by the metal brackets, so I cannot actually chew or bite anything. Should I call my orthodontist or is this something that I need to get used to?

I’m currently 14 years old and I’m kinda worried that my ulcer/deep cut is gonna get worse and stop me from wanting to talk and eat.