First off this is the first time I'm sharing some of my experiences with the internet. Anyway I am a decedent from a medicine man, which could explain the stuff that's happened to me in my 17 years of living.
Well, today I am going to tell you about what I call the "shadow man." It all started when my great-grandmother died from unknown reasons and just to tell you I was the first to find her... Cold and stiff, pallid. It upsets me still. So after a couple of months of depression and "I don't care about anything anymore," I began to take notice to a presence watching me as I tried to sleep (and this was before my encounter with "Rain" or so he calls himself) but that's for another time.
This thing wasn't a friendly one because he made me moody and wanted me to kill myself, then I had the dream. I was at our church which was in ruins. This might be the good time to mention that we tore down our church to rebuild. I remember because my grandmother was there but she looked different. It was either her or her sister but anyway there was a huge dark shadow at one side of the ruins and I wanted to go to it, but she wouldn't let me. She cried for me to stop although I couldn't hear her. I saw the tears of frustration as I looked past her into this dark abyss like thing, I saw it.
I saw the shadow man. He leaned a bit forward just on the edge of the light and I saw what looked like a black horn shiny and sharp. I cried as my body flung itself toward the darkness, but she held me tight as she placed her rosary across my chest. I awoke so frightened and I told my mother who took me to a medicine women a month later as I got increasingly worse with suicidal thoughts and tantrums. The women, I'll call her Rose, she took one look at me and saw inside me. Rose then told me I have a demon inside of me. She also said that it's been feeding off me for awhile now. So came the days of eating salt and the mirrors vibrating, the crying out of nowhere and couldn't sleep. Her next visit was to tell me it left and the reason it left was because I cried after hiding my feelings for so long I made it leave.
So I believe I have been possessed and I still believe that the demons around my home are still there because our church, but we are rebuilding it now.
And if your wondering why I haven't seen my grandfather who is a medicine man, well I have never met him because some family issues. Also, when my grandmother passed it was on the day of my grandfather's birthday. He is deceased but I'll that experience another time. Thank you for reading. Please do comment on anything and questions if you have any.
One thing you can do is just to live clean and pure/positive. And I don't mean over doing it, just in a manner that you wil find peace.
Btw what type of person was your grandmother? From the looks of your dreams and the occurring events is seems like she was fighting this entity for a while now, and now that she's not there anymore nothing is there to protect you. Christians call people like that the "strong man" a person the demons or any evil entity has go through before thay can reach the family.
I know you don't want advice regarding religious things so I'm just stating some natural laws.
Regarding the problem you have now, just say nobody is alowed in my room unless I say so, I only welcome peace and order. Out load in your room. Its just setting up something like a boundary. For example its like saying to your family there's no fighting in my room, its a room of peace.
I really hope things start to work out for you