Scared

So I met this guy a few weeks ago and had sex with him. I messeged him some time after but he didn't reply( I sent like 6 messeges). I messeged him again today and he said I was annoying and I said ok I won't messege you again and he said it's already too late you will take the consequences of your actions, watch out. And I said what do you want I didn't do anything and he didn't reply. What do I make of this threats? Do you think he was being serious. I am very frightened he knows where I live. Do you think he just said it so I wouldn't bother him again?