I was very desperate for a job and had unprotected sex with a guy who promised me a job on the 7th of March 2014, I took morning after pills on the 8th March, first day of my last period was on 16 March (of which I was convinced the pill worked). I then had unprotected sex again (after my period) with my boyfriend several times but don t recall the dates (somewhere from March 10) . I found out I was pregnant on the 10th of April and went for an ultrasound on the 30th of April, my Doc said I am 7wks 5dys preg. How accurate could that be as I believed at the back of my mind that I am between 5-6wks pregnant. Could it be possible that the pill didn t work? I m scared and confused that it might not be my boyfriends. Please help. I am losing my mind and can t seem to not stress about this mess I put myself in. I also have one more concern please, my period was normal as it lasted for 4-5days, *sigh* my boyfriend and my mother know about the pregnancy as we (my boyfriend and I) were pretty much planning to have a child together but the ultrasound dates just really gave me a huge slap on my face. The ultrasound based on the measurement of the embryo showed that my due date is on December 12, 2014 (my doctor didn t ask me when my last period was) I am also a bit confused about two other things as well - the first one being when I use the due date calculator by sonogram (reverse calculation) it says that I conceived on March 21, (how long does it take to conceive after sex) then the second calculation based on my first day of LMP which was March 16, shows that conception date was March 30. Am I chasing empty pavements or none of this changes anything? I had a miscarriage last year and really wanted a baby but not that of a man I don t even love.