Brown discharge?

Today is CD 10. My period lasted 7 days, mostly pretty light from CD5-7. But now for the last three days I have been having brown discharge! Some cramps here and there but not consistent. I thought my period was done as of day 7 so on day 8 me and my husband had sex. I figured the discharge the following day was due to my cervix being sensitive still (even though sex didn’t hurt) but idk why I’m still having brown discharge! Is it possible I ovulated already??