How much like chess is DB'ing? It is amazing the strategizing, and sheer cogitation that must be put into this endeavor. I so fondly remember my care-free days of being married. When I did not have to think about W, R, and D. I knew that she loved me, that she was my best friend, that we would be together forever, no matter what. Now, much like in your case, everything is a chess-game.
Having said all that, don't let her get under your skin. She is trying different tactics as well. She is scared and confused and this makes for a volatile chess opponent. Be prepared for the unpredictable. Also, I would really encourage you to support her on the therapy and bi-polar treatment. That could really work to your advantage. Get her well and I bet she will want her family and husband back.
Best, --Chris
Me: 40 She: 31 S: 5 D: 3 Married: 8 years (05 DEC 99) Blow-up: 02 JUN 07 Piecing (More like Ostriching): 22 FEB 08