Did not file for 2018 or 2019, do I still get a stimulus check?

I did not file for 2018 because I earned less then $500 for that year, and I did not need to file for taxes that year. For 2019 I was paid under the table, so I cannot do my taxes for that year. Do I still get a stimulus check ? If so what do I need to do in order to get it?