Driving myself crazy taking test after test from First Response. Almost every test has had these faint lines. Barely visible to the human eye! I can't tell if they're light pink or if they're grey and I'm just psyching myself out. My fiancé and I can both see the lines in about 3 of the tests. The rest were all BFN's. Can this be a possible pregnancy or am I seeing evap lines? Period due tomorrow!