Evap Line????

Ally
So I'm currently 4 days late and took a test yesterday (late morning) ...the test looked negative but was really quite dull - the control line looked so much stronger!
When I pulled it apart (carefully obviously) I could see another line however it was so light it was barely there...
If AF doesn't show her face I'm retesting Friday but what you think ladies??
Baby dust to all ✨✨✨