I don't think that it's that rare to have both. A lot of mental disorders overlap symptoms. And ADHD has a right rate of comorbidity with a variety of other disorders.

I have been diagnosed with both. And I'm not going to sugar coat things and say that my life has been easy. But I am a successful college student, working at two summer internships, hanging out with friends, living my life. These diagnoses don't have to be a disaster. They might present a greater challenge than some other people have to face - but let's be real here - it's like that quote "be kind, for everyone you meet is fighting a hard battle"