Hi 3ts,
I'd like to welcome you to bpdfamily, I'm sorry that you had a difficult childhood because of a sibling with BPD traits. I'd like to suggest a book to you, Dr Friedel had a sister Denise that suffered from BPD, she wasn't diagnosed or treated, there wasn't really adequate treatment then,
Borderline Personality Disorder Demystified, read as much as you can about the disorder. You'll quickly become see the benefits and become proficient over time. Can you describe what's going on in your office?