Hello Farry, and a warm welcome to the forums, and to post a comment might not be easy, but it is good to talk to people who may have experienced similar circumstances, even though it's so difficult for you.
I'm really sorry for what has been happening to your daughter and this extends to you and your family, and there seems to be no explanation why, and that's what worries you.
Sometimes there appears to be a reason, but we can never be sure why as there could be many hidden factors.
My heart goes out to all of you and just want to let you know your thread has been received, and I hope other people will reply back to you, as I start very early in the morning 12.30 am.
I hope you can please get back to us that would be great.
I have bookmarked this thread and please take care.