What Causes Delay In Period With Sharp Stomach Pains And White Discharge?

hi i had my period on 22 december 2010 and that was the 1 st day and lasted for five days, i am now due on 19th of jan 2011, in 9 days due on my period, i have had short, sharp shooting pains on my right side yesterday, not lasting long. A white thick discharge in pants but no foul smell, feeling very tired, and cried today at nothing, have had sex over the month un protected