How many days late before positive test??

Ashley

My period should have started on October 14th. Nothing has shown up besides me being so tired to where I’m taking naps now, going to bed early, feeling sick off and on especially after I eat, lower back pain, slight cramping and weird pressure. I’ve tested and I got what I thought was some faint positives? But nothing shown up. I haven’t tested in a couple of days and feel like I should give up on testing. 😞 How many days late were y’all before you got a positive?