Has your dr said anything to you about possibly having gastroparesis?
I have gastroparesis, some of the symptoms are nausea and vomiting 
http://digestivedistress.com/
Gastroparesis and Dysmotilities...What does this mean? 
Gastroparesis is a severe neuromuscular disorder of the stomach that results in a partially to completely paralyzed stomach. Individuals suffer with a spectrum of symptoms called "Dyspepsia". These symptoms range from nausea, vomiting, belching, stomach acid washing into the mouth (reflux), feeling of fullness after a few bites of food (early satiety), abdominal pain, abdominal bloating, change in bowel habits and weight loss. People with Gastroparesis can have substantial loss of their quality of life and are house bound for months at a time. 
Gastroparesis is also known as "Delayed Gastric Emptying". Delayed Gastric Emptying can be a component of numerous other gastrointestinal disorders like:  
Nonulcer Dyspepsia, 
Gastroesophageal Reflux Disease (GERD), 
Functional Dyspepsia, 
Cyclic Vomiting Syndrome, 
Functional Abdominal Pain, 
Irritable Bowel Syndrome (IBS); 
and also found in a subset of individuals with Chronic Fatigue Syndrome1.