When should I test?

Okay guys so AF is late by 1.5 weeks. I’m still getting negatives. I’m about half tempted to just go get a blood test done 😩 this other app I have says the gestational age would be 5 weeks this coming Friday. When did y’all find out? I’m seriously tempted to just tell my ob that I got a positive just to see if I can get an ultrasound to see what’s up.