Debora-
I've had a couple of episodes like you've just gone through, and they've lasted as long as two weeks, which really stinks when you're throwing up all the time.
Mine seems to also have been caused by acid reflux. Since I've started taking prevacid solutabs, I haven't been sick. But my rheumatologist just changed me to Arthrotec yesterday, which is an arthritis medicine with stomach medicine in it, so I'm a bit anxious to see what will happen.
I hope you have the answer to your problem now, and that you doctor will be able to keep the nausea and vomiting under control (as in, gone!) from now on.
Take care, Tracy