Confused and need help.

Kylie • 22 years old! Married my high school sweet heart! We have a beautiful 4 year old daughter trying for baby number 2!♡

So I had brown discharge from 7 dpo to 13 dpo. Then it stopped. Around 10 dpo the discharge turned light pink then back brown. I only had it when I wiped well today my period is 2 days late and all pregnancy test have come back negative. If anyone has had this happen please comment what it was.