It sounds like emotional dysregulation, which shows up in BPD, but it also shows up in trauma, anxiety disorders, autism, ADHD, and a bunch of other things.
I experience this periodically when I'm slightly triggered by someone or myself. When it comes to BPD, the breakdowns aren't always tied to stress you can see coming. Sometimes your nervous system is already at a 9 and the smallest thing tips it into a 10. The rage, the yelling, the self-directed stuff, that's usually not about the situation at all. It's your brain going into threat mode and dumping everything at once.
You're dealing with a nervous system that's on fire. Even if it's not something that has a label on it yet it's best to find a way to calm yourself in those moments so you accidentally hurt yourself or anyone else.