Can I get some insight?

How long after a missed period did it take to get a positive test? Did anyone know they were pregnant but just couldn’t get a positive until days or weeks after their projected period? With my first pregnancy I got a positive on the day of my projected period. I’m currently 5 days late for my VERY regular cycle. My husband and I are currently trying. I just overall don’t feel well and have been extremely nauseous mostly in the evening. All negative tests since the day my cycle was due.