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I have never experienced an Evap line on FR but I have had weird experiences with them. With my last pregnancy, I took two FR test and got negatives, on the same day I took a clear blue and a dollar store and got positives.

Since all three of them have faint lines I'd wait two days and test again using the first response. If you change brands you might get negatives because of the different sensitivities. Then you add even more confusion lol. Stick with the first response. In two days if the line is darker then you know you're pregnant and they aren't evap lines. Evap lines are rare on first response and they usually appear after the time frame. Getting three faint lines is probably a positive :) good luck!!