HELP PLEASE!

Okay, so I took a cheapie .88¢ test at about 1:00 this morning. I thought I saw a faint line, but I gave up and went back to sleep.
I tried the "add water to the used test to see if it's an evap" and, low and behold, the faint line did NOT go away.
Anyone have any insight on this before I flip my lid? Here's the test, post-water:
Thanks in advance ladies!
*note: I'm aware I could just go buy another test. In fact I'm about to! But I'm not asking about the un-purchased tests, I'm asking about this one. So thank you!* 😬