VVFL PLEASE READ

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I’m so confused so earlier I got a faint line on a cheap dollar tree, so I went home and re tested with two more with urine to see if the lines I saw were Evaps and then I did one with just water and no 2nd line showed, so are these real lines? I’m 8dpo is it even possible for it to show??? Help

Top pic is earlier:

2nd Pic is when I got home: