Pimples

I have always had really clear, perfect skin and had no more than 2 pimples at a time, but in the last week I’ve gotten atleast 15 just on my chin and around my mouth. I don’t understand why this would happen and I have a winter dance next week and I really don’t want them there. Can someone please help they just keep on coming and I have never had this many pimples on my face at a time. I am using the nuetregena acne solution and it’s always worked for me but with these painful pimples on my chin it’s just making them redder and causing more damage. I am 15 years old I need help and idk how to get them to go away quickly.