I don’t know anymore...

Is this a line? I’m confused because I’ve had a very light period this week-quite brown/pink in colour (they’ve been like this all 3cycles since coming off bc though so no reason to think this means pregnancy for me). Took a test to rule it out as I have a doctors appointment tomorrow and wanted to be quite clear in saying I’m not pregnant but this looks like a faint line to me... could it be an evap line? Pic taken well within time 🤷🏼‍♀️