The first day of my last period was October 8, 2011. I took a blood pregnancy test on November 10, 2011 and my level was 0. Could I be pregnant and too early to detect?

The doctor who did the blood test should know if it was within time, but it does seem early since you have not even missed a regular period yet.

Okay I smoke cigarettes and I am a month pregnant and just found out I can't just quit cold turkey would it be a little safer to cut down to a few a day