I saw a faint like at 2.5 weeks pregnant but it'll be darker at 3 to 4

3 weeks from the day of the incident. That’s what we tell our patients.
I’ve seen some pregnancy test turn faint positive at 2 weeks but 3 weeks for best results.

Some girls take it too soon and don't get it accurate at times..so what u did with both of my pregnancies I waited a whole month after a missed period to take a test

Thank you @roselove11

She should wait until her period don’t come in. If it don’t come tell her to wait 6days and to take it in the morning.