A.G.
Too early to tell for sure. You certainly COULD be. It also depends on how "regular" you were before. One of my 8 pregnancies didn't show up positive until I was 4 WEEKS late. Even the blood tests, ultrasounds and CT scan didn't pick up the tiny little life (I was having pain from a tipped uterus, that is why the CT scan happened).
That is the hardest part of ttc, waiting for that positive result. Try not to stress yourself out about it. Don't take too many tests. It will drive you crazy! ;)