HELP PLEASE 😭

i’m 19, i broke up with my boyfriend of only a few months the other day and i’m scared. he has exhibited some issues with control and manipulation in the past, but it recently got really bad. he has photos of me and has been threatening to send them out to my family and others. he also has something that could blow up my position at work and has been threatening to send that out as well. not only that, he continues to say he won’t lose me and will go to any measure to ensure that. he is manipulative to get what he wants. he promises he won’t hurt me and that he won’t blackmail me but continues to threaten. we are not together anymore but he won’t leave me alone. i don’t know what to do... please help me. i feel trapped.