Maternity leave

Hey y’all. I’m a 24 yr old single momma to be.

I’m 35 weeks along, due sept 13th but unsure if she will come before then or not. We’re dilated to a 2, & 25% effaced as of my last dr appt. I’m a full time cna, and working 5-6 days a week. My question is when should I take maternity leave? I don’t want to take it to early. Not only due to financial issues, but because I want to take it while she’s here and not before if that makes sense. Any advice would be greatly appreciated! :)