I am very sorry to hear that things are so difficult for you right now, but it is great to see you reaching out for help and support - a very brave and scary thing to do!
This site is a support group for those who are or were in a relationship with a person with BPD, so many of the posts can be triggering to a BPD sufferer. There are resources of the type you're seeking. Please check out
Resources for BPD Sufferers.
That said, if you want to explore your childhood abuse we do have a parent, Sibling and In-Law board that is open for those members who want to work on their relationship with a person with BPD (pwBPD).