welcome! Great news that your adult child is getting help!
Sometimes gender identity issues stem from BPD, as this illness makes for a fragile sense of self.
https://bpdfamily.com/message_board/index.php?topic=209415.0My adult son struggled with from college onward and was in torment despite me being supportive . He wasn't supportive of himself. I guess he couldn't be.
Blame , rage are Standard Operating Procedure for BPD unfortunately.
What has helped me 1. I read up on BPD . Stop Walking on Eggshells is a good starter . There are other book suggestions in the Library section of this forum. 2. I had my own therapy as well in order to cope. 3. I went to 12 step meetings for family members such as Alanon and Nar anon. These are free and are online; they teach some tricks on how not to get too enmeshed with the BPD illness. 4. I've read things on this forum , such as the topics on the pull down menu . 5. I am slowly realizing that I have the same rights as the sick BPD adult child.
The unfortunate thing is this illness is long and there are no short guaranteed answers. Lowered expectations helps, and that is sad but true.
Please feel free to write in. You can also click on anyone's name here to get their previous posts/ backstories. Know that you are not alone.