What cause milklike vagina discharge?

One possible: Cause is pregnancy. But leukorrhea can also occur at other times of the month. If you have a change in color, texture, odor or amount of vaginal discharge ; problems such as pain, itching burning with urination or sex or redness/swelling then it is best to see your gynecologist for evaluation ; accurate assessment. If your period is late - take a home pregnancy test.