When I've stopped medication, or started a new one, in the past, I've gone off the deep end a few times. I didn't realize it had happened until my brain chemistry settled back down enough for me to look back and think "what the heck have I been doing these past few months?"
It sounds like that may be the case here, but I obviously can't say for sure. Either way, I'm sorry you're going through this, and I wish you both the best.