When I was 7 I started feeling like I wasn't always alone, even when I was. I told my parents and they dismissed it.
The feeling never went away, instead they got worse. Depending on where I was or who I was with I would get these sinking, anxious feelings in the pit of my stomach; more of a scared feeling than anything else. The feeling was so intense at times that I would cry and shake all over, I was terrified. I started smelling smells that weren't present and hearing sounds that seemed to come from nowhere.
By the time I was ten this was common place for me. I told my babysitter at the time and she told me the only way to get rid of whatever it was that was with me was to tell it to leave. I did so, but it only made things worse. Cabinets and doors would open and close things would fall off shelves and I even saw a black shadow under my skylight that was more than a shadow because it didn't touch the walls and light didn't passed through it, later that night I saw what looked like a black cloak hanging on my bedroom wall.
My parents couldn't dismiss my claims anymore and my grandmother (who claims to see sprites) was brought in to smudge the house. This kept whatever was in the house at bay until my parents divorced and my mom's boyfriend moved in.
He was very mean and filled the house with negativity. When I would get upset that scared feeling would come back and things in the kitchen would move (kitchen was below my room). After that started happening the feeling came back, more frequently then before and I started feeling like I wasn't alone. I tried my best to ignore it and eventually it went away.
Every now and then I would get the feeling but I ignored it and it went away.
It's been almost 20 years since this started and now it's happening again and worse than before. The only difference now is that when I get the "scared" feeling I know something bad is going to happen, and it does. But other than that it's the same. I never feel alone and I often hear/see things that no one, except my cat, sees or hears.
I posted my experience in the hopes that someone out there has experiences the same/similar things as me and can maybe give me some insight as to what it is or how to make it stop because I can't ignore it anymore.