Quoting kitty1205:" My LMP was Dec. 19, 2012 (I have a regular 30-day cycle). I am expecting my period by Jan. 18, 2013. ... [snip!] ... no period and still having vaginal discharge and a sore breast. Any replies would be greatly appreciated. Thanks so much."
yes i think it's too early to test! you usually have to wait atleast 2 weeks for the test to come out accurately. i know when i got pregnant with my son, i was having symptoms like you were, i took the test in a week it came out negative. i still continued with symptoms, took the test again (waiting another week) and it came out positive!