Pregmate HCG strips

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Has anyone had issues with pregnate hcg test strips? You buy in bulk off of amazon ect. I got 2 faint positives on FRER a few days ago and all of my pregmate strips are negative. Af was due today and didn't show. Almost all of the tests have indents like little lines or circular indents. Ill get a another FRER if af doesn't show tomorrow