My stomach had been uncomfortable and then all of a sudden I felt very nauseous and got hot/sweaty. I really felt like I was going to throw up everywhere, and appendicitis came to mind and I got very concerned (but I'm very paranoid about these things). My hot feeling went away just now, after about 20-30 minutes of feeling bad. My stomach still feels a little off, but it's not like it was.
What just happened to me?