Welcome alydu: I'm sorry about the abuse you endured with your BPD mom. It had to have been tough for you, being home schooled. At least, if you could have escaped to a public school during the weekdays, it could have been some relief.
I'm dealing with an uBPD sister, so I have a different situation. There are many others here who can relate to a similar situation as you. I'm sure some of them will comment in your thread. I found this website, as a result of reading, "Stop Walking on Eggshells" as well.
I'm glad that you are in therapy. It can really help to have a professional to talk to. I started therapy to try and figure out what was going on with my uBPD sister. I didn't know much about personality disorders at the time.
Are you currently in contact with your father? After the divorce, were you ever able to have an honest conversation with your dad about your mom?
There are some good links to helpful information to the upper right of this post. The links below lead to some specific information that will likely be helpful:
FOG - DEALING WITH FEAR, OBLIGATION AND GUILTSETTING BOUNDARIES COMMUNICATIONS OVERIVEWThere is a lot of helpful information here. While you are in therapy, it can be helpful to read about various communication skills and tactics, and then try to periodically discuss some of them with your therapist. It can, also, be helpful to come here and post about various lessons and gain the input of others.
Check out a lesson or two and let us know what you think. Mourning the fact that you never has a normal mother, like most other people, can be similar to morning a death.