Another Pregnancy Test

Rihanna
Should I wait until I missed 2 or 6 days of my period to take another pregnancy test ? I have already missed 2 this is the 3rd day of my missed period. I have had all the symptoms seem like, I threw up Saturday and had to leave work. My breast aren't so but my nipples are and I'm still having milky like discharge. My period never been this late before.