Positive at home, negative at Dr.

Hey ladies,

Once again just looking to see if anyone has gone through a similar situation and can possibly offer a little advice....as of yesterday I was seven days late. Took a test last night and it was positive. The line was fairly faint, but certainly there. Also took another test this morning. Same thing. Called my doctor and they had me go in to see the nurse so they could "confirm the pregnancy". I went in this afternoon and the test they performed in the office (urine) came up negative. They told me to come back Tuesday and they will do another urine test and if still negative will order blood test. Please help. I'm so very confused/emotional!