Very faint line first response early result

I just bought the Equate Early Response (blue dye) test today and got a faint positive result. It was a very faint line but definitely there and blue. So now I'm wondering whether I can trust it since it's a blue dye test and since the line is so faint. I will probably take another one in the morning with FMU and see how it turns out.but visible lines, almost identical, but the control line was lighter. I then done First Response and the same result - test line (the one that tests for pregnancy) was very dark, but the control line (nearest to the handle) was very faint. Most of the online research suggests that a faint test line is more likely to be negative.