hi how early will other symptoms come m 3 weeks and 6 days so far I have back ache head ache white discharge ...nipples are getting darker ...no other symptoms

While some white discharge during pregnancy is normal, it shouldnot be itchy or smelly. This can indicate vaginal infection. If your discarge is smelly, accompanied by itches and/or is blood stained it should be evaluated by a doctor. Please visit your gynecologist for the same. Your doctor will do a physical examination and give medication if necessary. If the doctor says that the white discharge is normal, make sure you clean yourself regularly and use neat undergarments.