i had sex about 2 weeks ago, and we used the pull out method. i know this isnt very reliable but now this past friday i though i was gonna get my period but the i didnt cause the bleeding lasted only half a day and was very light. i also have been very nauseas and tired i have headaches and some cramping. i feel bloated and cant really eat anything, it all makes me sick, i have a 1 yr old so i know what being pregnant is like but my boyfriend has some doubts. is it possible to have all this and still not be pregnant, and i also skipped a whole month of my period, does this all mean im pregnant again?