Lost heat in car, it's -2' outside and then my car says engine overheated shit off engine, once i turned off all heat the overheat notice stopped

What is your question?

I noticed the heat wasn't working the second to last time driving. Then this past time driving I let my car warm up for 30 mins. Then i got in and still cold. No heat even after driving an hour it was still cold air blowing out. Then the light on dashboard came on stating "engine over heated, shut off engine" I then turned off all the buttons relating to the heat on dash. And a minute later the over heat sign turned off and ran fine without touching the heat buttons. Also it was very cold that day -2 with a windchill. I also added heet to my gas tank the night before when I got gas. I'm a single mom with the inability to work so cheap fix in prayers but honestly I need this car so I need help determining what's going on. Thank you

What makes this problem better or worse?

Turning on the heat

How long has your 2007 Chevrolet Impala had this problem?

A couple days