Suggest Treatment For Scary Disturbing Nightmares At Night

Hi I had a really bad nightmare last night that a demon was trying to get into my body..in my dream I kept trying to call out for help but my mouth couldn't make the sound I remember leaving my room and calling my father who was in the hall but my voice sounded like a demon.. My father never spoke but I couldn't make his face out and he just backed away from me.. In my dream I thought I woke up several times but each time I was still asleep and being chased... When I eventually did wake I couldn't distinuish between the dream and reality.. Can you tell me what this could mean? It really has left a huge impact on me as I've never watched a film or known Anthong related to any of these incidents.. I woke up in a cold sweat and called out for me father after a few minutes of realising where I was... When my voice came out normal I realisedi was awake.. I'm scared to go to sleep again tonight in case it happens again