Could it be an evap line?

Brie • 🌺 Neurosomatic Psychosynthesist Momma to two beauties🌈M.N.2015 🌈A.N.2018 Angel Baby 9/5/2023💗🙏🏼
Hi all!
DH and I have been TTC for almost 10 monthS. Today I am 5 days late- however even though I have been doing well on a regular 29 day cycle for quite awhile now, I have endometriosis, so there are times when I'm late depending on the cysts and not pregnant. 
Today I couldn't wait any longer so I took a couple tests. Almost instantly a very very very faint line showed up on both tests before the test line was finished appearing. About 10 mins later I looked again and the lines looked more like the thick test line only they weren't as filled in and the blue was more an edge outline. 
My question is- could the evap line show up that quickly? And if I weren't pregnant, would that super faint line have showed up so fast or at all? 
I don't want to get my hopes up :(

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