so ive taken a couple of tests now and some came out with reallyy faint lines and some with nuthin and this was about two weeks ago an i evn took a first response an came up wit a faint line withn seconds then bout 4 days aho i took the clear blue both had vvvvfl but came up withn seconds can someone plz tell me wat thus could be af is suppose to be do on the 12 if i was pregnant wouldnt it come out positive already or no ?