if u have regular cycle . many of times urine pregnancy
test doesnt come positive with in 4-5 days of missed period .
u should repeat this after 7 day .
to get early result you can go for blood HCG
level .than only surety can be made .
as u have discharge from your breast . it happen because of increase prolactine hormone level .
consult to doctor and get blood test
for prolactine hormone .
hope this will help u