I had my ultrasound today it says I'm 16 weeks and 2 days pregnant. According to my last period I should be 15 weeks and 4 days. If I'm 16 weeks and 2 days that means I conceived around March 19th just 7 days after my period. Does this make sense? Could I be further along possibly? I didn't have a period on February the last one before that was January 21, 2012. I'm just wondering if it's possible to conceive so soon after a period and my baby is 14cm which is quite large for 16 weeks. Has anyone been through something similar?