What the hell is this😓

Lexi • 19 years old/ Insta: lexihedlof

I've had this growth on my stomach since 2015, it started off the size of a pea, now it's like the size almost a dime, maybe a bit smaller.

Also now it has a little red circle in it if you can't tell.

Does anyone know what it could be?? It never hurt before n now it just started hurting.. I'm literally having an anxiety attack😥😥