I'm sorry that you had a rough reminder, carmasia.
I've broken down crying and lost complete interest in sex during passion a few times with my bf. In my case, I get triggered by my bf talking dirty. Instantly, I am overcome with intense shame and have to stop right then and there.
While the trigger isn't the same, the effect is the same. My bf doesn't understand my 180 degree change in mood and behaviors. When triggered, I usually roll away into a defensive position & hide my face as I sob in shame.
Hope that this helps you feel better understood. You aren't completely alone or misunderstood.