Linda, these are nerves for sure then. When i'm scared or worries, my stomack acts crazy too. You just gotta chill down, and tell yourself nothing should terrify you.
Did you take any pills? You'd better do just in case if it is some infection. And i dont really know if you have that medicine in Brazil, but its kinda carbon pills, they just absorb stuff. We take it like 1 for 10 kilos of weight. If you have it, then since your stomack is empty you should take some. Or just drink water to wash your stomack (look at my precious english skills, "wash your stomack"
).
You shouldnt worry about such things. When I get terryfied myself (I do believe me) I try to think about worst situations and what I would do then. Like, if you would feel sick somewhere, you would just leave for the bathroom. And you can always keep pills with yourself, I do!
I'm here cleaning up, come to msn for a while, I will cheer you up