Omg...story of my life, especially in HS and recently in wrk...but hey lemme tell u from some experience(i cud be wrong in ur case but im tryin to help here) that dis is ur self conscious criticizing u on wat u said and how awkward/foolish it sounded etc.,..ur inner critique,...u shud tell dis critique to shut up..(i did this today at wrk, im quite the awkward quiet guy there, and it worked!) and then things shud go by more smoothly for ur convos/small talk..people hardly think on wat uve said wrong as they prolly also worried about themselves and other things too...oyaa and today the few things i did say at work i dont regret...they were subtle jokes ..my style and they went by great.. so yea i think its fine to do it once at home maybe but dnt do this right at that moment......my answer kinda drifted a bit..but i guess today wasnt awk for me at work and im tryin to pass on some knowledge to some other socially anxious peeps.