I've heard you're not supposed to get the shot once you're sick (or WHILE you're sick)
Personally - I don't believe in the flu-shot, unless you have immune deficiencies or if you're an elderly person.
I can totally commiserate with you on throwing up, it FREAKS me out too, but if it happens, not much we can do about it
- Just take lots of liquids (water, OJ, Carrot Juice, etc) eat fresh fruits and lots of chicken soup!
I hope you feel better soon!!