I know a fair few people who have a diagnosis of BPD (borderline personality disorder). It was really confronting when they were first told and kind of freaked them out for a while... But then they realized that it was just a label!
There are some really helpful therapies available to help with DBT. A few people I know have had great success with DBT.
Who diagnosed you with it? Are you still seeing them? Make sure you ask them heaps and heaps of questions. That's what they are there for.
Take care - I hope you can find some things that help you cope soon.