Nope..... Look at your question there... if one's "provoked" to say stuff, then the one with any regrets should be the one doing the provoking. That's a valid consideration, at least.
But the question is based on the very Christian thought to turn the other friggin cheek. Dude, when someone pisses on my back yard, I ought to be able to say something about it... left & right cheek be damned, you know?
I guess, though, one must sometimes reflect upon having been driven to say shit that would have otherwise been left unsaid.
Repent all you wish. Shit said is shit said, nothing to change it. So better not dwell on it too much. Better dwell on how to fix it, *if it's something you care about*. If not, then be glad you said the crap you really thought to begin with.