Unsure

Kaylin
Hi everyone , so I took a test and looked at it right away ( quick glance then put it away )and it was negative . But then I looked at it about 20 minutes later and I saw a faint line . I'm not sure if this is a Evap line or a positive . I know I need to retest but It's too late to go buy a test right now and I just want some of your opinions .