Possible False Negative? Need some serious advice please.

So I use the withdrawl method, which has worked for me ever since I've been having sex no problem, though I hear it isn't that effective.

I was supposed to start my period September 1st, and didn't. I've been having nasea, breast tenderness, fatigue, just all of the early pregnancy symptoms, so I took a test yesterday(september 5th), and it came back negative, but I barely peed, like a dribble, so i figured it was maybe a false negative, because I still haven't started and I have the symptoms. I took another test about 30 minutes ago and it came back negative again, I used Clearblue digital easy read both times.So could I be pregnant? Where is my period?