Actually, EDS kinda runs in my family. My sister has it quite severely, the hypermobility type (that's the really flexible kind if I am not mistaken), I might have it to a much lesser degree as well as my mother and another sister.
We all suffer/ have suffered from mental illness, though I am currently dealing with a cancer at the moment too, which obviously isn't ideal for my family's mental health

Regardless, my sister is quite knowledgeable on EDS, and has currently mental health concerns pre-dating my diagnosis. So you're not entirely alone!
Soon to be cancer survivor!! What-what!