insurance for baby??

I'm currently unemployed, and I'm on my mothers insurance plan at her work until I'm 26...it has covered my pre natal care like normal doctor visits I just have my $30 co pay but I don't think my daughter can be covered on her insurance too because it's not her baby. I don't know what to do, how do I get insurance for my daughter??? I'm getting nervous because I was stupid and pushed off doing it for way too long and now I don't have many weeks left 😢