*hugs* try not to fall to far into that spiral.
A breakup is a strenuous emotional time. Lots of weird things can happen.
Just, REALLY try not to throw up the food - I've heard of people who have done that on a regular basis and can't stop. the sooner you try the better.

Try other ways of coping if you can, enjoyable activities, reach out to your friends. And realize that breakups are hard and that it's ok to be sad. Just try not to create lasting habits (throwing up) that will be hard to kill later.
*hugs*
and wish you the best