Scared to fall asleep. Chronic nightmares. hallucinations?

My name is Max, and i'm 14 years old. Since I was 12 i was always concerned about sleeping, I was afraid I would have a nightmare. But I always got to sleep.Then I started having recurring nightmares about a small girl named Helda who is six years old. In the beginning she would just be in the the background and as each dream went by, she kept getting closer to me. It finally got to the point were she would murder me, The dreams happened maybe once every 2 weeks. She stated she loved me and she was dead, she would kill me so I could be with her, but it felt much more sinister, like she enjoying torturing me. Iv'e had a few experiences were I have seen her after iv'e woken up; Is this normal? She would be by my bed, she would even put her hand on me, I would blink and she'd be gone, but I was awake when i saw her!
Are these hallucinations? I became spiritual and was able to put it at peace. until lately iv'e had zero nightmares, I told my friend about her and he jokingly called to her.
It may have put my mind in an un-easy state, and last night I had a dream, that she was in all my pictures, and iv'e been very frightened lately, very jittery as well, and am scared to even turn off the light or even go to seep, is there anything I can do? help please.