night terrors

i have a problem with night terrors and dreams im 19 years old. i have always had terrors and got worse as i got older. it used to be spiders but recently i get people standing over me one is a man at the end of my bed and the other is a woman in a wedding dress a fairly big woman and she is next to me i also occasionally get a man walking to me out of my wardrobe. in the last few weeks i have been seeing faces appear and i dont have to be asleep, im sometimes just walking into a room and i see reflections they just appear in my sleep and just in my daily routine. since i got mith my partner of 3years i have been having dreams of him cheeting with girls and his ex. i recently lost my grandad, my grandma, a family friend and my partners grandad all ths happened in two weeks 3 of wich 3 days running i havnt slept well since this happened in may. can you explain my bad sleepind