When I used to see main t in person, I would often stop in the building's bathroom just to cry in private, splash water on my face then get it together with a publicly acceptable face.
These days, if CBT T or main T upset me--i wait.. if it doesn't pass or gets worse I'll leave a phone message saying I was upset and why, and whether or not I need them to call me.
usually they do, then I feel better. Rinse and repeat