imaginary positive line?

Aby
I took a pregnancy test today (because I'm obsessed with peeing on a stick 😂) even though my period is not expected l for another 5 days. And I could swear I saw the faintest line ever! but everytime I look away and look back the line disappears 😃 I think my brain is playing tricks on me and I'm hallucinating 😂😂😂😂. Has this happened to anyone before?Â