Hello, I done a first response test yesterday first morning wee and literally instantly a white line came up and then the storng test line. The white line then disappeared after about 30 seconds and I can barely if I look very very closely and in different angles see a very faint line where the white line was. Could I be pregnant or was this a definite no as all the posts I read about suggest evap lines only appear after the result time window is up? So confused.