If I had to venture a guess it sounds like dissasociation with the tone changing during a onset of recurrent memory manipulation. It seems like the tone is most likely hurtful so you pull out of the conversation, but when you look back at it you're realizing it was meant towards you in an ill context. & dissasociating is the way you handle seemingly abusive situations.
I have some issues with dissasociating & during my absence I have said or done things I have no memory of at all. I have quit my job twice & threatened to remove my managers eye with a teaspoon, just as example. While I can't help but find it slightly amusing it's also frightening. Not sure if that helped but welcome to pc where we've done, said & heard it all. Come without fear or embarrassment. We understand.