when to take a digital??

Jay🌙✨💜👧🏻👦🏻🤰🏻 • I'm 29, married, and mother of 2. Pregnant with my third which will be me and my husbands first child together. I love to coupon!!! Baby #3 due 2/22/18!!!
Very faint line on both... 11/12 dpo when can I take a digital so my husband will believe me lol I don't wanna waste a test.