I'm sorry you're so sick.
When you've got that much output with vomiting, dehydration can happen really quickly, so I would call your doctor first thing tomorrow (or tonight, if you start to feel dizzy and weak).
You can get IV fluids at the hospital or at an infusion center, which will make you feel so much better. I hope you feel better soon!
Dx'd Crohn's in '99 at 28. Proctocolectomy and ileostomy in '06.
Disease-free, medicine-free, and very thankful to be healthy again.