Pregnancy test info

I was wondering i am 5 weeks 4 days pregnant I had an ultrasound and baby is in my uterus my question is my pregnancy test have been pretty dark but tonight I took one it was there but light but my pee is always really clear but has a little yellow too it but I drink water all day long that's all I drink!!! I am not cramping or bleeding no pain!!!! Can my pee be to deluded is that why it ant giving me a stronger line