Childhood Morning Nasea and Vomiting

Since my daughter was 5-6 years old if she got up too quickly in the morning she would become naseated and vomit a small amount of yellow liquid.  I consulted several pediatricians and they felt she would out grow it.  They also suggested having her eat crackers or toast before getting up.  That worked sometimes, but it seemed she needed to get up very slowly.  This would happen several times a week, sometimes even after eating a small amount of toast or crackers she would still vomit out the window in the car on the way to school.  She got in the habit of vomiting to get it over quickly  while she was in school, because once she did she felt fine and could eat anything.  The amount she vomits is very small and yellow, and she is extremely nauseated until this liquid is out of her stomach. She has no problems during the rest of the day or evening.  We were always late to school from either allowing her extra time to get up or to vomit. Now, she just always tries to allow herself plenty of time in the morning to get up, but sometimes she can't so she just vomits as quickly as possible so she can get ready.    She has always been thin,  she is 5'7'' and a size three. She never has any problem eating spicy or any kind of food.  She is 19 and still has this problem. She doesn't eat crackers or toast when she is nauseated because when she vomits she prefers an empty stomach.  She is helping me care for my 92 year old mom so sometimes she has to get up really fast - and then she  goes outside to vomit. A few minutes later,  she will eat anything from left over spagetti, a burrito, bacon eggs, toast or pancakes, because she is fine then,  and for the rest of the day. She doesn't drink or smoke, she has an active social life and several hobbies, does well in school.  Is there medication she can take and what could be causing this?

[dontknowmuchbut]

morning vomiting- my experience has been with my husband- with very very severe vomiting (for years and years; for days/weeks at a time every few months, nonstop, and leading to kidney failure at one point- until diagnosed with 'cyclic vomiting') He felt fine in between. IV anxiety and nausea meds helped him thru some ER visits. Cyclic vomiting affects more children than adults but seems to come in more spread out cycles, less violent. We've managed to identify triggers- especially STRESS and LATE NIGHT EATING, also lunchmeats. Sometimes he vomits only yellowish bilish stuff (early am almost always) and then feels much better. Avoiding alcohol, tobacco; more water and less spicy/fried foods and dont lay down for a few hours after eating (gerd stuff) probably good idea. Some people try 'stomach migraine' medicine - there is a lot of info out there , and well worth it to look for someone you care about. Might be concerned about the effects on the esophagus after such a long time. Could make you feel better to search CVA (cyclic vomiting association) to know that you are not alone and maybe catch a lead. Did I mention stress and late night eating? My husband has been nearly free of vomiting episodes  for 3/4 year now.