Am I sick? What's going on?

I was watching TV and after the show ended I realized I needed to go the bathroom. I #2, but then suddenly started to feel hot and nauseous and sweaty. Then I had mive diarrhea, and started omitting. I got really dizzy and had to lay down on the floor. I dumped ice water on my head because I felt so hot. I layed there for about a half hour. Calmed down. Took a shower. Now, an hour later, I feel fine but a little lightheaded and my stomach feels like it wants to be left alone. I slept most of today for some unknown reason and hardly ate a thing. What was that all about? Should I be concerned or is this something that happens? Right now I'm laying down and sipping ginger ale.