Light pink spotting, 6 days late?

Ka'Ashka

Hello, today when I went to the bathroom i noticed pink spotting only when I wiped, I have very mild cramps. Could this be implantation? My nipples have been sore and I had vomiting today. I have been really nauseated a lot. I took a test when I was 4 days late but I got a negative. Thoughts ladies ???? I would really appreciate the responses!!