Reoccurring dreams that I’m in hell and I’m being haunted by demons

I constantly have dreams that I'm in hell, and this has been going on for about a year now. I would say that I'm not very religious, but these constant nightmares of hell are starting to make me scared that there is an afterlife and that this is what being dead will be like. In these dreams, it's always me being trapped inside somewhere very dark, with a shadowy or black humanoid taking possession of loved ones like my mother or father and trying to kill me. It literally causes me to lose my breath in real life and leads to extremely high nighttime blood pressure. I would like to mention that I always have poor sleep hygiene and that I suffer from trauma in my waking life.