Hello, from the history you have given, well white discharge from the vagina can be due to many causes...It can be physiological like discharge 4 to 5 days prior to menustration and following menustration, discharge following sexual intercourse is quite common, this is because of vaginal secretions and semen. ....But if the discharge is associated with fowl smell or itching or fever, then underying infection should be ruled out like bacterial vaginosis or candida.... Some women in pregnancy may have white discharge...You haven t mentioned about your last menustrual period date. ..Well if you missed your period, you can do a urine pregnancy test to rule out pregnancy. ...hope i was helpful to you. ..