I am 19 years old and have been suffering with this problem for quite some time now. What happens to me is, every 2 weeks or so, ill randomly wake up in the middle of the night with a terrible stomach ache, not being able to go back to bed. Then, at the most 20 minutes passes, usually it happens right away, I find myself ruunning to the bathroom where I throw up only once. Here is the weird part, after I throw up (brush my teeth and clean up), I go back to bed feeling totally normal and being able to fall back asleep fairly quickly. Ive searched all over the internet but have not been to a doctor yet because it doesnt happen everynight and I have no pain afterwards or the next morning. So far ive found the most common reply to this problem is acid reflux, but I have never had heartburn a day in my life so I dont think its that. Please, if some one has any sort of idea as to what it could be, please let me know. Although it doesnt cause pain, throwing can be very uncomfortable, especially in the middle of the night. Thank you.