I don't have an answer, unfortunately, but it is a good thing the people who have you in therapy/care will talk to each other to find a way to help you.
You could have something else beside BPD, the mind is complicated and different things can go on at the same time.
If they can identify what it is, they will have more information to help you feel better.
Psycosis it is not nice, but it can be treated.