PCOS is known to be hereditory aswell, although saying that Im the only person in my family to have it.
Don't be scared, its not faital it just helps if you know you have it.
As for coping with it, Well I didnt cope very well with it, to start off, but I was 18 when I was offically diagnosed and I had been struggling an awful long time to lose weight, and get my periods back, not to mention the excess hair etc I also suffer from.
It does get better though. Easier to cope with, when you have support. x