Why did oil light come on & beep, could it be a sensor that just needs replacing

What is your question?

Started beeping really loud. It stayed on for about 3-4 minutes then stopped. This has happened twice. The first time only a few seconds Miles on car 65000

What makes this problem better or worse?

Nothing. I was sitting idle in a drive thru both times

How long has your 2012 Chevrolet Sonic had this problem?

2 weeks maybe