Hey K3yw33, Welcome! I used to get angry and yell at my BPDxW, too, so you are not alone. When we mimic the abusive behavior of a pwBPD, it's called catching a case of "the fleas."

It's normal, so don't beat yourself up. Next time, try to be more aware and practice disengagement instead of retaliation, which is far healthier. Fill us in more when you feel like it and let us know if you have any specific questions.
LuckyJim