Mira wrote: My check engine light was on for the last a week and a half, and I didn't do anything about it. Today it went off. I'm going to assume that means everything is fine.
Holly's right, have it checked. I'm betting it was a loose gas cap. The computer in your car will have logged what exactly the error was. I just learned this (so I'm inflicting it upon you): when the computer system in the car finds something wrong, it logs it once and does nothing. The second time it logs the same problem, it turns the "check engine" light on. If it checks the system and gets no error twice, consecutively, it turns the light back off.
And on another note, I seem to have had ALL the fears the rest of you have had: Jaws, bottom-biters, underbed creepies, tendon-slicing. My gosh, I was a basket case as a child. I also ran from vacuum cleaners and flushing toilets (hurt my ears).