Might be a silly question but how long after a missed period have u ladies waited to test? Only…

Might be a silly question but how long after a missed period have u ladies waited to test? Only reason I haven’t jumped on it yet is it’s only 4 days late but my period has been exactly on time to the day every month after having my son, but I’m exhausted and crampy like I would be if I had my period, but I kinda think the same thing happened when I was pregnant I don’t remember. So I just don’t know lol