Expecting to be pregnant. period late. etc.?

hey .. well to be blunt i have been having unprotected (completetly) with my fiance for the past two months ... my last normal period was on the 25th of december ... i then was having throughout jan, and my period was due on the 22nd but instead got some VERY light bleeding on the 20th .. that lasted two days compared to my normaly very heavy period thats lasts 7-8 days. . . i have been having pregnancy symptoms of hunger, my are so so so ooo sensitive that i can feel the fabrics rubbing on them .. i have had frequent headaches .. some lower back pain .. and some cramping and aches in my belly on :S ... i have also been having throughout febuary .. my period was due yesterday but did not come and hasnt come today either.. however lately i have been having white discharge quite a bit ..n once what i thought could be like yeast infection but doc said it wasnt. Around this time that my period is due i have been always runnin to the bathroom to check if it has come