had a D&C August 8th, still no period?

Nichole • Mommy to an 👼🏻 baby and to our 🌈 baby boy’s, Charlie 6-12-19 💙💙 Emmett 5-18-21 💙💙
This coming Tuesday will be week 6 since my D&C. My period has yet to show it's face. When is a good week to take a pregnancy test that would actually show positive for a new pregnancy? We have been TTC again for 4 weeks now. So I'm really praying we have our rainbow baby soon. I've been having random pains in the pelvic area, but Idk if it's pregnancy related or not.