I had a dream

I am in Trinidad right now for Christmas at our house with my mom, sister, brother, and dad.
The first night I was here, the night of December 23, I slept in my grandmother's room (my father's mother). I am not sure if it was her bed, but I suppose that does not matter as much as the dream does.

It was not a dream. It was a nightmare.
I am certain that I was in REM sleep, because when I began to realize what I was dreaming, I could not move, I could not speak. I wanted to cry out, I wanted to run to my dad, but I couldn't.

My grandmother's spirit was there and she was talking to me, and I told her how sorry I was that I was so little when my mom took my sister and I to live in America and that I never replied to any of the letters she had sent me. I remember appreciating them and knowing they were special, but I did not know anything about writing back when I was five. I thought she would be happy to know, but she became so angry. Not visibly angry, but she or some other spirits held me down to the bed with the sheets all the way up to my neck strangling me. I feel like at the time I knew why, but I cannot recall. I think it's because they thought I was lying, but I am not so sure now.

What happened next was that I ran to the adjacent room, my father's, and told him what happened and he let me sleep next to him, but he told me that he had not thought that his mother was angry. He said that he thought that she had been at peace, but now he was not so sure.

When I finally woke up at 8am in the morning on Christmas Eve, I decided not to tell anyone. I did not want him to think her spirit was restless, but now I am not so certain that I should not have said anything.