Answer:
I agree with the first person.
Even if you don't have depression or a diagnosed medical condition similar to that, taking deep breaths and trying to relax and calm your nerves maybe by chewing gum or drinking hot tea and closing your eyes for a minute, can really help, trust me. Try, too, to look for the positives in the situation.
There's always a positive to balance out the negative; always.
I know exactly how to deal with it, because even though I don't have depression, I am naturally just a very emotional person, so I get sad all the time. I know how that feels. <3