They're diagnosed BPD and depression. They are also the older sibling. I am always on edge/stressed that they'll harm themselves or be reckless. And it's always on the back of my mind even when I don't want to actively think of it. Every time they go out, start feeling/being depressed I worry about that and how I don't want them to feel that way. I had a panic attack for the first time in over three years, after receiving a phone call two days prior at 3 am hysterically crying over a relationship issue. The next day they walked in acting totally ok and not thinking how I might've been worried. I never talked to anyone about it so I believe it was pent up emotions that needed to be released. Do you guys think that may be the reason why I had it?