I don't feel like a real person

I'm 18 year old girl and it honestly feels like I'm not a real person I feel I'm in my head and I'm controlling my body like in a video game. I feel like everything I do in my head I see it like I'm in third person and most of my memories are in third person and most of the time I just stare off into nothing and just do nothing I will have a tire day where I just sit outside in my backyard on a rocking chair not doing anything and I'll just stare often to nothing. But in my head I'll live in my own world. And that feels way more real it's weird in my brain I have my own little story like this whole world inside of my head with different characters different people and uncontrol everything I can go back and do things and I'll just think of that world for hours and hours. But then when it's time not to think about the world. I'll go being noticing what's happening around me and none of it looks real or feels real. I also I hear and see things that other people don't it's weird I'll hear banging on my door I'll go out and check and there's no one there or I'll ask my family members if they heard banging and they'll tell me no. Or I'll cracking sound behind me. Or I will feel needles all over my skin just poking me in or I'll I'll feel people grab me and pinch me but nobody is actually touching me. Or during being my world or feel everything that's going on inside my head I'll feel the people touching me and I'll feel in here everything that's going on and I'll just sit there and and live there