What would cause my car to not start so suddenly. on 1998 Pontiac Grand Am

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
I've been having issues with my car not starting after driving for awhile. Like its too hot or something. Last night i turned my car off, but the key wont go to the off position. After messing with it for 15 minutes, i unplugged the battery. This morning i stuck the negative cable back on the battery and tried to start my car. It turns over but wont start. Key is still stuck. Its got half a tank of gas, and i jumped the battery in case it was low.
(2) Answers
i had the same problem and came out to be the ignition switch it was 45 dollars on advance autoparts and it work
Qualified Local Pontiac Shops
Qualified Pontiac Shops For This Repair