BFPs then BFNs and brown discharge

A few days ago, I tested in the evening and got a faint BFP. Tested again the next day and got a fainter line. But I got BFNs yesterday and today (pics below).

No AF yet but I did have brown discharge (just when I wiped) for 2 days.

Has anyone experienced this? Is there any hope for seeing a BFP again?

1st BFP

2nd Vvfl

Last BFN