Well if you've been on the same meds for 2 years then I doubt your current state is med induced...but if I read wrong and not your entire cocktail is 2 years old, then I suggest you talk to your pdoc about the newest addition.
I've only had 3 mixed episodes ever, thank God. They were thee worst BP experience I've ever had. Lucky for me they are not the norm, nor did any of them last long. I hear they're harder to treat chemically too, but I wouldn't know about that. My first one I only told my pdoc after the fact because I didn't want my meds tweaked, and the last 2 I wasn't on any meds.
Buuut, I do get agitated quite often, so I really do feel for what you're going through.
Remember, this too shall pass

hopefully very soon!