Me and my big mouth :(

[Spixie33]

I agree with Playfelt and Apples&bananas. If you say something then it looks like you are worried or that you were indeed saying something bad/wrong.
I would stay quiet and see if the parent mentions anything or references it in the next day or so.
If they do ask what happened this morning then say that you were just having one of those rough mornings. You are only human after all. Hopefully the parent didn't hear much. I would just be very careful the next while to make sure that this parent sees your best side