Hi Shellfish,
Welcome to BPDfamily!
It looks like you certainly do have a lot on your plate.
You mentioned
Most difficult is my mother who has a bipolar I dx and features of BPD and who depends on me for too much, my sister who’s had addiction/significant mental health problems for 25 yrs,
I am sure you also noticed the board for those with parents and/or siblings with BPD. You will find others there as well who can relate to your situation and will likely be able to pass on some good information and strategies for dealing with things like this.
Do you want to tell us some more about your child?
We look forward to conversing with you!
R