My Daughter Is Experiencing Symptoms That I Had When I

my daughter is experiencing symptoms that I had when I was about her age 22. It comes on very suddenly, 10-15 minutes, get a sinking feeling in your gut, break out in cold sweats, feel as though you might faint, and is relieved by vomiting or diarreha. Lasts about 15-20 minutes and followed by extreme fatigue for 1/2-1 hour. Very mysterious. I was diagnosed with an ulcer in my esphogus and treated accordingly symptoms went away. I was a smoker/drinker she is not. Any ideas? thoughts?