Vaginal Itchiness but...

it’s been itchy all day today and i have no clue why. I should start my period in a few days but i’m just starting a three month on the pill cycle (so i won’t have it till may). i am not sexually active and there is no discharge, funny smells, or burning pee. i do, however masterbate often so is it possible i tore something? i also have a bump right next to my opening but the itchiness is up through my clit as well. SOS!!