I agree w everyone who says they see lines on some and not others. Even though I see something faint on some of the thicker tests, it isn't very visible and could be evaps. I see a second line that's more visible on the two thinner strips that say HCG on the test strip but that could be evaps, or it could really be BFPs and that brand is just more sensitive than the others. If you're about 8dpo I would wait a few days then take another test but a diff brand like FRER. Good luck .