Emily, When I start my car, the check engine light is among the several that light up on the dash. I always thought the problem was if the check engine light stayed on after ignition.
Usually, if you try to start a car and there's a whole lotta clicking with no ignition - bad starter.
If there's a whole lotta grinding and churning, could be the battery or alternator.
There are times when you must speak, not because you are going to change the opposing side, but because if you do not speak, they have changed you.