Anxiety and Nightmares! What can i do?

ive tried relaxing, but nothing seems to work. my mind races constantly, and if i phone someone before bed i always think its the last phone call, then as soon as i get into bed i panic like CRAZY that someone is watching me, or someone like a killer is in the house and theyre going to kill me and my family will find me and be horrified by some gory scene or they'll die and i'll be alone, or that ghosts are in my room watching me sleep and it's absolutely MAD. as much as i know theyre nto there, i cant convince myself that they're not there. ive tried listening to calming music, ive tried doing relaxing things but if i listen to music i stay awake too long and start to panic so much that i get too hot. Mainly because i hide under the covers in case someone sees me, its completely stupid but i just cant stop it. what the hell can i do!? TV helps but my parents tell me to turn it off. night lights would be good too.. but i havent got one yet but ULGH. its taking over :(