Overwhelming Fear

This is my first post on here! Something happened last night (on my birthday of all days) and I'm not sure how to explain it so I've come here for some help.

I am currently sleeping in my mother's bedroom and have been for about 1 month. We thought we were moving house until about 4 days ago, so I packed up my room and moved into my mother's to use my room as a packing room. I never really liked my room. It was always cold and something didn't feel right. Some nights I wouldn't sleep at all. When I moved into my mum's room everything was fine and has been until about a week and a half ago.

I have not been able to sleep with the door open. If it is open I get this overwhelming feeling of being watched and the fear that comes over me is immense. Even if I am sleeping alone in there, it takes a lot for me to actually fall asleep with the door closed and the light on. If the door is open when I go to sleep, I will always wake up in the middle of the night without fail and sense something over by the door and will always feel something watching me.

Last night I went to sleep and I woke up about 3 hours later, I think it was about 2:20AM, and said to my Grandma (who is staying here, my mum is sleeping downstairs... Weird I know) "I can't sleep" even though I had been asleep for a good couple of hours. Then there was about 5/10 minutes between this and what happens next of which I can't recall. The next thing I remember was screaming and yelling for her to close the door. On the verge of tears, I was pleading with her for about 1 minute, then mid-screams I stop and fall to the pillow and I assume I went to sleep. It's hazy but I remember not being in control of what I was saying/doing and then it all just stopping (if that makes sense). I couldn't control my own body.

This house upstairs is exactly the same layout as my house before last and in that house my mother said that when she woke up in the middle of the night she could feel someone watching her from outside the door, but she never felt threatened... I do.

If anyone can shed any light at all on this it would be much appreciated.

Thank you for reading.