Everything means less than zero

Ever conversate with someone and all the conversation you're enjoying yourself and having a lovely chat and then you get off the phone and start thinking "wow, what asshole thing did I say this time?" Every time I talk to anyone on the phone (or in person for that matter) I have a similar internal dialogue with myself. Like, just this evening-I had a clever chat with a list person. We talked for about an hour and a half and all the while I'm thinking about all the fun bits of information we're sharing with each other and how I don't really even know this person but we have this THING in common so we're getting on grand. I even shared a rather embarassing story (but I knew it at the time-see, so I knew I shouldn't be proud of this story-and I'm not but I still share it it's that kind of story-it involves Jager-nuff said). Yet, as soon as we were off the phone, even after getting our plans to cross paths on Sunday before JJW I started thinking "what asshole thing did I say? I said something so unbearably stupid I will be blacklisted for life. What dumbass thing did I say?? Oh, I am an eejit and I have proven it by my stupid actions before even seeing the people in the flesh."
Is this normal? Is it a pretty regular reaction to think that after having a pretty good conversation with someone you come over all self conscious and start to think that there is something that I (you, the person in question) said that at the time seemed inconsequential but in reality it's the biggest moment of idiocy you've ever participated in? I swear I live in a constant state of-oh my God, did I say something I didn't realize I was saying at the time. This even happens when I'm conversating with people I know-I'll talk to people Im friendly with and at the end of the call I'll wonder what stupid friendship ruining thing I said during the course of the conversation.
I live in a constant state wherein I assume all I ever say is the wrong thing. Do I only say the wrong thing? Or do I have issues of a whole 'nother sort? Maybe, I just have some kind of social anxiety disorder that leads me to believe I have less than zero social skills. Then again, maybe that is the sum total of the skills I have.