Was my Test Accurate?

Ka

I am about 9-10 DPO, and I am expecting AF in about 6 days. I took a first response test and it said negative... is it probably accurate? Side note, it had a thick white line for a while, and it took about 3 min before it went away. I prayed it would fill with the pink dye, but it eventually disappeared. Is there any chance it wanted to be a positive or is that just what they sometimes do?

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