I think it’s totally understandable to be freaked out by that, it must have been totally surreal. Its not so much that you reacted badly to childbirth, you reacted that way because it was completely unexpected, and you were on your guard a bit because it was night time and strangers, and because something quite huge and momentous (for them I mean) and potentially incredibly tragic if something had gone wrong, was happening right on your doorstep, out of the blue. I think you can give yourself a break over that one. And a pat on the back.