I'm not sure what the time is where you are (Assume middle of the night?!?) but you need to try and focus on something else; give your mind something to keep it occupied with something YOU choose, rather than let it dwell on feelings and emotions.
How about doing a crossword/sudoku?
I assume going for a walk is not on at this time?
Watch a comedy on TV
Phone a friend
Read a book
Partake in hobby

I hope this passes soon; I can imagine how uncomfortable it must be making you