Test dries positive

Maude • •👼🏼C 💙•H🌈•B🐻

I bought a pack of first response tests. I took one and thought maybe I could see a faint line. So I waited a day or 2 and took a couple more. I feel like I can’t see anything but then I come back around 30 minutes later and there’s a line. And I feel like it has color unlike an evap. Any advice.

The 2 test are the dry one and the bottom test is the first one I took.

Thanks for the help.