when to take a digital?

Mallory • 27 year old 👩🏻 Vet Tech 🐶Married to my amazing husband 💍 Hayden Lois 12-24-17 💗 Treyson Allen EDD 2-10-20💙
I got my first positive yesterday and I was wondering when I can take a digital and have enough hcg for a positive?