hi there, thanks for writing to us, Having sex five days prior and after menstruation is always safe, since it is considered safe period,but you had further sexual relationship without any protection , so there are chances of getting pregnant. so it is advisable to do an urine pregnancy test to know your status of prenancy. Leucorrhea is abnormal if there is change in odor, color of the discharge, irritation or having vaginal itching, painful urination, bleeding from vagina, grayish white discharge, fishy odor from vagina mainly after sexual intercourse are all associated with vaginal infection.other causes are 1 Hormonal imbalance 2 Poor health and unhygienic condition of female genital organ. 3 Vaginal infections or sexually transmitted diseases. 4 Yeast infection like candidiasis. 5 Failure of involution so it is advisable to do a vaginal smear to find out the cause of white discharge. let me know if you have further questions thank you,take care.