Is this normal or do i have paranoia?

Keep in mind what I'm telling you is a small portion of my typical day. I'm always told by people that no one is judging me (whether that be at soccer training or in the classroom). Yet I keep thinking they're are judging me, I try to reason with myself though no matter how reasonable the reason, I always go back to, "They're always watching me, they think I'm weak and therefore I'm worthless in their eyes."

I think that everyone pities me, the only reason they don't bully me is because I come across as eccentric. I feel the only reason that people listen to me is because they can't really leave (because they're in school or they're family). A harmless comment, an insignificant action; these things come across as hostile to me.

I write this because the other day I was walking towards a sliding door, a family approaching the same door from the other side. I couldn't help but think that the door opened just a little too early for them. That very moment, for but a few seconds, I actually believed the door opened earlier for them because the door thought, they were better than me.
P.S I don't take any illicit or licit drugs.