Good day to all doctors..i need an obgyne to answer these questions: I am confused, when i had a pregnancy test just last Sunday, it was negative at first then hours passed by, when my sister was about to throw the test pack, i checked it again and i think there is a second line but it is not clear, it is a faint line......i tried again but i bought a cheaper one this time it was negative but there was no instruction on how many drops to put, after 30minutes i added more drops then there was a faint second line that appeared....but i think it was not valid anymore....now to clear my confusion, i went to my doctor and was asked for a TVS, the result was negative...but i have a feeling that i am pregnant... is there a case that pregnancy will not still be detected because it might be too early for the ultrasound? thank you