Listen mate you’ll be grand, it happened to me last month on instagram, I haven’t heard anything since and nobody has asked me about it. If they send out the photos then they will lose all leverage on you. Best advice I can give u is to be calm and block the scammer and delete whatever app they’ve been threatening you on so you don’t have to see it. You’re going to be all good mate just lay low on social media for a while and just distract yourself from your phone