I am a 16 year old with this problem. It happens only in the mornings.i did go to a dr for this and headaches too. I was prescribed Zofran at the time I was 15. I also used to actually throw up for real. The Zofran was to make it stop, which it did, but I saw my actual dr later and she orders me to stop taking zofran. To be honest I am not the healthiest teenager there is. I don't play sports nor do I exercise a ton. My eating habits. Are pretty random too. The headaches turned out to be migraines from having too strong of glasses and as soon as I got contacts, this problem was minimized. I have learned that blowing my nose when I start dry heaving works sometimes.