can I trust these tests?

Courtney
Okay, this is the 3rd faint positive I've had with clearblue, and I have seen so many bad reports on them! This is mine: I am 16 dpo, period 3 days late, and I keep getting these faint lines! Am I losing my mind or is this a positive, or a bad test? It came up straight away. I've brought up the color a little bit.