4 weeks pregnant or not?

I assume that I am 4 weeks pregnant because I experience few pregnancy symptoms like dizziness and sore breast. I also have a milky white vaginal discharge this past few days (7 days to be exact) that is very unusual to me. But when I take pregnancy test, the result is negative. I took pregnancy test after a week of my expected period. Can you please advice me. :( #pleasehelp #advicepls