Domestic abuse survivor

I'm a sixteen year old survivor of domestic abuse. My ex boyfriend was horrible, he made me fear for my life several times. I still have relapses where I'm still scared. I'm incredibly nervous right now, I've locked the door to my room and I can't get to sleep, every sound makes me jump. 
I have told practically no one about this so I don't have anyone to talk to to tell me I'm being crazy and that I'm safe. I guess this is my way of reaching out.