How common are false positives on the clear blue tests? I got a vary faint line on a test this morning that showed up almost immediately, so naturally I had to take another lol. I used a cup so all the same urine, and the tests came from the same pack. The second one is negative! I don't know what to think. We've been trying for so long and that plus sign was the most beautiful thing I've ever seen, so to get a negative right after is heartbreaking. What do you ladies think? Both pictures were taken at 3 minutes.