Me, too--One of the signs of my being manic is a blabber mouth!! And, yes, I, also, later think, "How could I have done that!"
We'll hope for the best. Probably not much damage was done in the scheme of things.
My greatest fear is overspending. I have had some irrational times when I have bought things I didn't have to have. Well, like another car....
We know you are a smart, very capable person. Alas, episodes like you spoke of just go along with our diagnosis--and probably the best we can do is keep them at a minimum through meds and therapy. But it's not like we can just shut up at will! (I wish.)