I think you are, especially if your that late on your period. People are different, or there could be a problem with you.
Are your periods usually normal? If so then there's a really good possibility that you are, but i'd go to the doctor and have them diagnose it by a blood test, and if it comes out that you're not then i'd have him check you out because something could be wrong.
I was diagnosed with cervical cancerous tissue, and it came up because I got pregnant, it has to be cut out when the baby is born, so it really could be anything that can come as a big shock.
My pregnancy test that I first took one line came up dark and the only line was faint. Then I took it again and both lines were dark. Wish I could take a pic and show you so you could compare, but i'm in the process of moving and everything is in boxes at the moment.