Late period

I’ve been ttc for a year now after a miscarriage and me and my boyfriend have been having unprotected sex doing my fertile window multiple times a day and I lay there for ten minutes after straight this month of November my period is late it was suppose to start 11-26-2020 and today is the 11-29-2020 my period normal last 3 days is always on time when do you this is the best time to test ?