I'm the only BP'er in the family, 2 healthy parents and 5 "normal" siblings who've experienced nothing other than situational depression...
I don't think any of them worry about getting it though, I've been presenting clear symptoms since age 14, so that's 14 yrs now and no sign of anyone else following my footsteps.
Hopefully my daughter will be spared too.
Don't worry about it

oh and a warm

to PC