Victimised

Hello I’m 17m uk. Same old story happened to me and I fell for the trap and didn’t realise at the time. I sent the scammer a pic of my face and my thing on telegram where they also got my number. When they started sending me texts about blackmailing me I immediately deleted the chat and my account. Can anyone help me and tell me if anything will happen and should I change my phone number or is it necessary and what should I do.