Normal vaginal discharge, known as leukorrhea, is thin, clear, or milky white, and mild smelling. Changes in vaginal discharge can begin as early as one to two weeks after conception, even before you've missed your period. Almost all women have more vaginal discharge in pregnancy. This is quite normal and happens for a few reasons. During pregnancy the cervix (neck of the womb) and vaginal walls get softer and discharge increases to help prevent any infections travelling up from the vagina to the womb. Try to wear 100% cotton underwear, it will prevent reduce unpleasant smell (as you produce more such discharge as you progress with your pregnancy).
White discharge is normal during pregnancy