What Causes Abdominal Pain And White Vaginal Discharge Along With Dizziness?

hi, i am 21 year old married woman.since a week i have been noticing very mild cramps in the lower abdomen and white vaginal discharge.in two days i am due for my periods to begin.we r planning a baby is it possible i could be pregnant. i also feel dizzi and tired without any exhuation at times.but not very often.