I would throw cautilon to the wind and speak with your family physician just the same. I think he is supposed to keep your confidence, and as long as he doesns't go running to her (which I seriously doubt) nothing is lost in the attempt.
On of the primary problems with BP's is that they often don't believe thier sick. Quite often it's something that they just don't see. They don't see the symptoms and what they do see, they interpret as a "Bad day" or pms or even your fault, even though you can clearly understand that is not the case.
The fact that she has physically attacked you changes this situation. She needs help, if she refuses to get it herself, it is your job, as her husband, to get it for her. you didn't say if there were children in the picture, but if so that makes the need even more immediate. You may have problems getting people to listen, be persistent, if the first dr. doesn't listen, find another. Perhaps suggest family counseling. She may not feel as threatened if you're there by her side and she doesn't believe all eyes are on her.
Don't give up, where there's a will theres a way. Post here when you need support. Thats what healingwell is all about.
God Bless and Take Care
Good judgement comes from experience and alot of that comes from bad judgement.