I'm sorry this is happening, Waves. It sounds like the last thing you need right now.
Since you need your job, please try to do what you can to salvage the situation. I think your idea of having a heart to heart with your boss is a good idea.
Rhonda had some good suggestions, but I don't know if you have FMLA benefits or EAP programs where you are. I agree with her about avoiding disclosure of your BPD. I had an extremely bad experience with disclosing my MS to a former employer.

You aren't stable right now. I agree with Mari that you should contact your pdoc. The zyprexa may help now, as Bizi suggested.

I'm sending you some (((((((HUGE HUGS))))))
and hope that this situation works out well.

Hang in there!
Kay