I might be pregnant so when I go to eat something and smell it cooking and realize I don't want it anymore is that a symptom?
Pregnant women tend to have more sensitive smell, so yes that could be a possible symptom. But don't rely on that to determine if you are pregnant or not.
No, this happens to my mom a lot and she is NOT pregnant.
It could be. Then again it could be you're getting the flu.
It's one of many, many things a pregnant woman can experience. It's in NO WAY an accurate indicator of pregnancy. Don't play guessing games and go buy a test!