I don't get anxious from interacting with people but whenever i do, i do almost always feel very anxious of the result of that interaction, i keep overthinking what i should have/haven't said even though the interaction went mostly well. This somehow makes me feel like no serious conversation i make is ever complete, it seems like what i said was either too much or not enough, so when I'm done  i would uncontrollably try to render in my mind the stuff i said and how i should've engaged in that conversation in a better way than i did, trying to redo my lines and thinking of how i should have said xyz differently, or maybe not say it at all, i cant help but keep finding more relevant ideas/arguments with which i could have formulate my talk during a conversation that's basically already finished.

This makes my brain try to seek an exhausting state where I'm always supposed to thoroughly and perfectly choose my words (more than i normally should) before taking on small serious talks whether its school or work related, i would get anxious over the perfect right things to say when i clearly know that a normal conversation should be based of spontaneity. So i would always question my ability to even hold a normal conversation where i don't seem either awkward, slow-witted or immature when in reality hardly nothing like that would be the case. 

I've talked about this with people i'm friends with and all of them judge my conversations and things i say during it to be completely normal, I am also confident in how i formulate myself I'm educated and smart to some degree and i know that in other people's POV i seem like a good decent human being, but then why do i get hit by the feeling that somehow what i said wasn't truly enough?

Thanks for reading :)