Questioning Dependency status for Covid stimulus

Hello, I have already filed my 2019 tax return and I chose "someone can claim me as a dependent". But after I filed my taxes and my parents went to file theirs, it turns out I am not eligible to be claimed as a dependent anymore. Would this leave me with a dependent status(leaving me not eligible for the COVID stimulus check) or would that conclude as me not being a dependent(leaving me eligible for the COVID stimulus check)? Thank you.