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What do you think?

I bought these cheap tests on eBay and I don't think there is a line but I just want to be sure! AF is 8 days late... I started metformin for PCOS over 3 weeks ago.. Has this happened to anyone? (The dye run) And then later you've got a BFP??? Please HELP! This is the third test I have used that the dye has ran.