What Causes Pain During Menstrual Cycle And White Discharge?

i got married on december 12th 2010. i used to get periods around 6th or 7th.. but in january i got my periods on 12th.. think misscarriiage..then for this month febraury. i am experiencing menstructual pain and white discharge from 3rd onwards..
cont left any weight.if i do so getting abdminal pain.. i am 26 years old my weight is 36. am i not cable to get pregnant. whatis my problem. madam