What else could super light brown discharge be 6 and 7dpo?

Angela • 🌈🧸due 5/31/25

I had super light and almost unnoticeable trace amounts of light brown (not similar to around my period at all, not thick or uterine lining or clot like) 6 and 7 dpo along with my regular watery cm. it was just tinged, no red. it's obv not from AF....or Ovulating....soo??? what else could it be???? fingers crossed for IB