One idea would be to just let yourself cry and go through it, see what is on the other side. Another idea would be to watch something funny on TV, or find something on web, anything that might get a laugh out of you.
Another idea would be to sit down and write it out, in a journal, on paper, on computer, somewhere. Write out all the negatives, all the harsh tapes playing in your mind. Could vent and also get a look at what is going on, there in black and white on paper. Then could come up with the reasons why those things are not true, and also the positive true messages you could give yourself instead.
Could put on some music you love and dance! Dance around, wiggle, be silly, twirl, move around.
Anything you can think of that will help you feel safe and secure during this would be great to do. Teddy bear, favorite clothing, treat yourself super well.