sometimes it helps if you use a conception
calculator and remembering the dates you had sex and compare it with your
symptoms. i tried putting your last period in a calculator for you if you are on a 28 day cycle.
Results: 4 weeks 6 days from LMP
First Day of Last Menstrual Period: January 6, 2011
Probable Date of Ovulation: January 20, 2011
Possible Dates of Conception: January 16 to January 24, 2011
Due Date: October 13, 2011 (40 weeks)
HOPE THIS HELPS!!!!!