I don't work, so I probably shouldn't reply. But I can relate in a way.
The child/adult thing. When I am in an elevated mood, I feel like a kid. Litereally. I feel & probably act like I'm 12 or 13.
When I am in a depressed mood, I feel every single one of my 42 years.

And when I am in an elevated/expansive mood--I'll say anything that comes to my mind. It's like there is no filter. I'll divulge personal info that I wouldn't want anyone to know--to a total stranger. And I'll talk, going on and on, about a subject that I know very little or nothing about, as if I were an expert in the field.
It is so embarrasing. Even at the time I'm doing it. But I can't stop.