Having read all of your accounts I can clarify that yes it is demonic possesion but please dont be afraid or lose heart this thing can be beaten as I have been through it and am still going through it.
I come from a muslim background but never really practised Islam as I believed in God but preferred to be labelled spiritual rather than follow an organised religion which in my eyes was just rigamarole. However after being wrongly diagnosed with Schizophrenia my father took me to see a religious cleric that explained to me what was really happening. What was happening was manipulation and possession by the Jinn.
The Jinn are servants of the Devil (i know this sounds far fetched) and are hologramic bodies of light that you cannot see or touch. They are like Humans in that they have communities are male, female, gay, straight etc and are structurally superior to humans. Their composition is much like that of the angels bar one important factor they are created of a smokeless flame and are attracted to smoke so quitting smoking is imperative, if you dont smoke then dont start.
They will try their hardest often repeating over and over again the same things to deviate you from the straight path.
The universe is made up of particles and waves and its in that realm that they operate and live, right now in your house there are waves all around you that you dont believe in because your five senses dont pick them up and in fact block the neurons in your brain. We are actually, despite our illnesses at a higher level of consciousness than other people that go about their daily lives unaware of these beings.
They can make you hallucinate, hear their voices (often impersonating people dead or alive, mine have impersonated God and angels!), they can touch you, go into your body and change your gaze and persona, they can try to molest your five senses there are so many ways they have affected people over the generations.
So what do we do about it?
Here are some tips to help you!
1.Try and be as calm and serene as possible
2.Be brave
3.Think positive thoughts
4.Keep your mind busy and productive - the idle mind is the devils playground.
5.Ignore the voices, ignore them - I know its hard.
6.Keep yourself clean, wash everyday.
7.Quit smoking and definitely dont do drugs.
8.If you are religious go to church or mosque.
9.Zikir- this is a remembrance of god exercise and is a way to zap the jinns like you had a laser gun! All you have to do is repeat the names of God according to your religion over and over in your mind - NOT SPOKEN OUT LOUD. So if you're muslim there are 99 names of God like Halim or Muid or Moqtada. In Christianity and Judaism the names are Jehovah, Adonai etc. Look them up on Google. You may see people with Rosary beads what they are in fact doing is using these beads to recite the names of God in their head to keep the Jinn away from them.
Read a book called Spirit, Man Jinn by Ahmed Hulusi, once you have read this book you will feel a sense of relief that you are not alone in your problem and it will give you the answers to your problems like I hope I have in my condensed version here.
Good luck my people
Peace out
Mus