Hi. I am 30 years old and trying to determine if I could be pregnant. I missed a period this month and I think it could be from stress, but I'm not sure. My average cycle is 23 days and I am almost always on time. My last normal period started on 9/11/09. My husand and I had unprotected sex (withdrawal method) on 9/27/09. I took a First Response Early Detection test on 10/8/09 (at night) and another on 10/12/09 (first specimen in AM). Both were CLEARLY NEGATIVE - NO 2ND LINE AT ALL. It doesn't seem like I could be pregnant but since I'm normally so regular the missed period has thrown me for a loop. Should I be confident that I am not pregnant with 2 negative tests well after my period should have started? I should add that I have been under more stress than usual and had some very, very light spotting on 9/24/09 and 10/2/09. Any thoughts or advice would be appreciated!!