Missed period + brown discharge

Ashton • thyroidectomy • married • would like 5 kids someday •

Our last TWW wait (19 for the digital I’m using) was the 15th. I missed my period and about 3 or 4 days ago I had a negative. Today my period should have ended if it had happened. I went to pee for the second time in an hour and had brown discharge. 🤔 anyone know what this could mean?