Implantation bleeding? Tad TMI

Intercourse happened the 21st ( most fertile day )

Started bleeding brown today.

And my period isn’t due until 8 days.

Normal? Or maybe implantation bleeding?

Never had it so not sure how it’s suppose to look or anything.

Right now just light brownish flow. 🤷🏼‍♀️ [tmi I’m sorry]

* last period started on March 10th. My cycles are about 30 days long. My next one is suppose to be the 11th