Yikes! You need to talk to your doctor. Certain anti-depressants, mainly the type called SSRIs, (Selective seratonin reuptake inhibitors) when given to a BP person will send them straight into mania! I don't know much about efexor but I'd check it out.

I was put on an anti-depressent before I was diagnosed BP, and I was absolutely nuts! There are anti-depressants that will work with BP (wellbutrin is one) but do your research.

So sorry about the episode. I know when that happens you just think, who is this person in my body making such a huge scene? But you'll get through it... hang on to your confidence.