Is it normal of you feel trapped in your head like this?

I feel like I think so much and analyze these situations that I can't let myself go and be. As much as I want to go along with something, I know in the back of my mind it's stupid or wrong while others just do it. When I do go along with it, I feel weird later like tingling inside like I cnt believe I did it as little as accepting someone accepting me by laughing with me not at me for once and I'll be with these thoughts in my head freaking out and I'm just screaming leave me alone! I've just never had the respect and tolerance I long for to this day so as time went by, I just observed and collected these sights in my head which have now conquered my life. Recently though, I have been letting myself be more than ever idk how but its been feeling so good. For the first time honestly I felt accepted and normal just by one girl, i guess part of it cause i accepted myself be; if i felt like i looked like an idiot then I looked like an idiot and laugh it off, not feel paranoid bout it wanting to fix it or stuff. I don't want to ruin this of me and her (btw im a girl who doesnt get along with other females) meaning I don't want my head to get in the f*cking way as usual or else I will go crazy; yea I have not yet. I feel like I'm beginning to learn and grow by leaving my head behind and be more present rather than trapped in my head. Usually when I start feeling good though, it eventually goes back to how it used to be and that's mentally unstable basically which I feel it coming right now... oh no. I don't want to feel like this like im trapped in my own mind.