Am I pregnant? Need advice

Caren

So I’m 15 days late (December 23rd) Had intercourse on Jan 10th, and all I have experienced was itchy breast, sore, back pain, nausea, would feel tired at times, and yesterday I had light pink discharged, today I had yellow/white discharge and then after blended a little. I took a test last week and it came out negative, but not sure if I was early, today marks two weeks! And I need to know should I take another??