What does it mean when you wake up and throw up?

Morning "vomiting": The longevity of symptoms argues against a mechanical problem, suggesting such entities as diabetes, atypical migraine, lung &sinus problems, &even functional disorders of the gut. Look at what is vomited, and is there blood present, weight loss, wheezing, fever, cough--the doctor will ask about these and more when he/she clarifies the history here. Evaluation is certainly warranted.