welcome to the group and i am glad you found us despite the circumstances that brought you here.
it must be so difficult to watch your daughter struggle but at the same time it would be understandable if you are feeling some relief for finally having some answers as to why she is the way she is, and hopefully the meds can help her as she learns to cope with the new normal of knowing about her diagnosis. i think it's so important for you to take some time to make sure you are being gentle with yourself and getting the self care you need to heal as well. i know it hasn't been an easy road for you to get to this place based on what has been shared, and i want you to keep telling yourself there is nothing you could or couldn't do, did or didn't do that made your daughter the way she is. we can't controll someone's PD, we can't cure someone's PD and we didn't cause it either.
genetics? who knows if she is like her dad or not- it's not for us to say- both my biological mother and her mother are most likely PD- i always am concerned I could have been that way too, but i also had to make conscious choices from my early adult years to get the help and support i need to not react to thing like them and even now, 25+ years of no contact later, i call my therapist the minute after i hear my mother coming out of my mouth, so some of what your daughter is doing and experiencing can be within her locus of control if she is willing to try and do the work.
i know the other parents here can benefit from your wisdom and experiences that you've learned along the way- and we are listening when you are ready to share more.