I would not demand anything. Humble is the best approach. And hopefully with the VP you can resolve it. At first I voted no on the telling medication question but after reading your post I am not so sure. Lots of medications for different conditions have bizzare side effects so you could possibly just not mention mental health and say it was a medication issue. In this day and age I am not even against lying when it comes to mental health in a work situation. Although i have found being open has been better for me but it is a sticky situation and I would lie if I thought I needed to. Like thyroid being out of whack would explain the behaviour.

Either way I think you will get your job back if you are humble and just own your part of it.