When can I take a digital?

Amanda • Just turned 30, trying to start a family with the love of my life. Together 9 years, happily married for 1.5!
After three days of faint positives, I think I'm finally starting to believe I am actually pregnant! I don't want to tell my husband until I can take a digital though. This was my FRER this morning, on the first day of my missed period. Should I try with a digital tonight or wait until tomorrow or Tuesday? Thanks ladies!