You do nothing John.
When you ain''t in control of any feeling in your head remember literally do nothing.Sit in a chair in your house and let it pass.
It''s the irrational actions that if you do anything will get you in trouble.
You just have to rationalise it in your head.I talk to myself out loud to rationalise things.Like the out loud voice is reality to talk to my irrational internal voice in my head.
Why I am getting all depressed and jealous about a bird who thought so little about me she dumped me by text?
Should be your little mad man chat when you need to calm down your irrational mental state.
See bet your feeling better already.
All the best
I am prone to ''rehearsing'' in my head what I would say if I could. I tend to repeat the same phrases over and over in my head. I think saying it out loud would probably stop me being such a loon in my head!
To get the emotions under control you might also try writing it all down. I scribbled like a woman possessed to get it all down. It just tumbled out any old how in scribble, in capitals, with underlining, circling, arrows and crossings out, just pages of it. What he said, what I said, what I wished I''d said/done etc etc. It helped me a lot.