This would depend on the length of your menstrual cycles and when you ovulate. My answer is based on an average 28 day cycle with ovulation at 2 weeks into your cycle. As of January 4, 2010 (today), you would be 6 weeks, 2 days pregnant with a due date of August 28, 2010.
The question was asked on the 7th of March 2011. 26 weeks before that date was the 6th of September 2010. It is being answered on the 15th of May 2014. 26 weeks before that was the 14th of November 2013.