I'm sorry you keep vomiting. I don't like an "IBS" diagnosis either; for many people it turns out just like you said - the real problems don't get diagnosed in a timely manner because the medical team has decided there is "nothing wrong except an irritable bowel."
It's hard to say what might be next for you because you didn't provide a lot of info - what kinds of drs you've seen, what testing has been done.