could i be pregnant? We used the pull out method when having sex no other protection. we had sex 12 days after my last period and 12 before my "period" started. the "period" was spotting on thurs. moderate flow fri. spotting sat. and sunday. took a test but came up neg. as i see it if i am i would only be 3 weeks along would a test even show positive that soon. i have had nausea and breast tenderness. is this all in my head or could i be pregnant?