False Negative??

Ive taken 2 ClearBlue digital pregnancy tests. Both have been negative and if I was pregnant I would be around 10 weeks so a pregnancy test would notice it. It says to pee on it for 5 seconds but I didn't think I had 5 seconds of pee for either test(I realized after taking the second one that it had to be 5 seconds). Could they be false negatives? My therapist thinks I'm so crazy because I am stressing out about this and she "knows" that I'm not pregnant. What do yall think??