oh, dear, you're so great to realize your mistake!
You know, I often do the same: emotions can rule my words, intonations or deeds faster than I can understand what is happening, and thus I can hurt my beloved people... And with the baby it's the same - sometimes I can become crazy with his behavior or crazy games, and only later I realize I was wrong.
I feel like sh*t in such moments, hate myself that I couldn't control myself. Of course, I say Sorry, I hug and kiss, I regret about it sincerely, but I cant correct the situation and come back to the past, and I feel guilty for a long time, "eating" myself...

But one day I read a great psychological article where specialists explain that there are NO ideal and perfect parents, all of them can be wrong sometimes and make mistakes, it's Ok!
Parents are just people, not robots or Supermen, they can be ruled by emotions as well, and they can behave wrong too, and we must just take it and keep calm. Don't "eat" and blame ourselves like I did.
Of course, we should improve our skills, rule our mood and emotions and not be ruled by them, and we should realize when and why we were wrong and say Sorry to our kids. Then they will understand people can be wrong, but the main is to understand it in time and apologise!