First of all, hey, I'm new to all of this

I recently turned 18 years old, and got referred to CMHT (community mental health team in the UK) originally because I'm not with a mental health team at the moment and I've got an existing diagnosis, but then the person who referred me mentioned that I should have my diagnosis looked into. So I'm going to be assessed for BPD. It's been mentioned loads of times, mostly indirectly but in ways that were very obvious to me and there are mentions of my symptoms in my notes which literally describe me as emotionally unstable. She was the first person to mention the possibility of BPD as a diagnosis which is a bit of a relief. I've had consistent symptoms since I was really young. Has anyone here been assessed by them or a personality disorder service? What can I expect?