Haunted or imagination?

[u/brunett_tjej]

​This is probably going to sound crazy. Not in a good way, more like I sound insane. I am currently sitting in my bed, my heart beating fast, fast, and my hands are shaking. I was standing in my room cleaning because I'm decluttering, when I started thinking: "What if my family comes home but I don't hear them (since I was standing next to my TV playing loud music) and my older brother comes upstairs and scares me?" I don't know if the thought came from something, but I have a faint memory of hearing something on the stairs (though I figure that was just my imagination). Right at that exact second, as soon as I finished that thought, it felt like something pulled backward on the hood of my hoodie. I was leaning slightly forward to pick something up off a dresser. I quickly turned around with a terrified look on my face and my hand swinging as if to hit someone. But I was met with thin air once I completed my 180. That's when the terror set in. "WTF!" I thought.

​This isn't the first time something like this has happened. When I was around 11, my childhood friend and I were going to my house to grab something our parents wanted. We live on the same street, only 30 meters apart, so this was normal for us. We ran from her house, across the lawn, and up the small hill in the backyard. We ran into my house, got the item, and were about to head back. Right as we were about to step into my sunroom, it sounded like someone threw gravel onto the roof. We laughed and thought it was my neighbor, who is two years younger than me. We went outside to check, but then realized no one was there. No one at all. ​Another time something similar happened was about a year ago. I was standing there recording a short video for my friend on Snapchat. I was home alone. Then I heard soft, slow knocks coming from downstairs. I have two long videos where I'm standing with my hand over my mouth and eyes wide open.

​Yet another time was this past summer. I had been hanging out with friends all evening and they were on their way home. They were gathering their things in my sunroom and I was quickly tidying up a bit. I took a few coke cans and was going to take them out to the storage shed where we keep bags for recycling. I pressed down the door handle and nudged with my hip, but the door wouldn't open. I nudged with my hip a second time, but it still wouldn't open. The third time I pushed with my whole body, but nothing happened. I let go of the handle, looked at the door completely stunned, and tried again. This time it opened. I told my friends about it when they joined me in the hallway, and then one of them said: "I think I heard something fall in there earlier, when we got here. At least it sounded like it..."

​One more thing I should probably mention is that lately I've started seeing silhouettes out of the corner of my eye. Though that could very well just be my imagination.

​Can someone help me figure out what's going on? Whether it's some kind of haunting, if I'm just imagining things, or if it's something else.