Could I be pregnant?

Priscilla

I always get sore breasts a week before my period. My period is due is 6 days. I have currently had sore breasts for 6 days now... I've been extremely tired and yesterday and today I had ONE instance when I had pink discharge. Just once yesterday and once today.

I took a pregnancy test this morning (8 DPO), and it was negative....am I testjng too early?