Does anyone get feelings of regret after you've spoken? Like you shouldn't of said anything.

Does anyone get feelings of regret after you've spoken? Like you shouldn't of said anything. I might speak up and join in on a conversation, stutter in that conversation or sometimes not at all but I often have after thoughts of regret, like I shouldn't of said anything in the first place. I think it might have something to do with my stutter but it's probably self confidence. I'm not sure.