Itching

PLEASE HELP. Ok so this is really embarrassing but a few days ago I had a little fun before showering and it was great just regular but now I’m itching so much down there to the point where it’s painful and burns I don’t know what’s going on. Anyone else or just give me sum advice :/ cus walking to classes at school rn isnt fun !!! Fun fact it was w an electrical toothbrush 😬😬