3 days late...bfp?!?

Danielle • Married my best friend on 4/11/2015. I have a son—rainbow baby born 2016, and trying to grow our little family💗💗💗
My hubby and I have been ttc since April and this is the closest to a positive I've ever gotten after countless tests over the months. My period is three days late so maybe this is my month? What do you think? Retest?