Period 11 Days Late But 5 Negative Tests

I have a doctors appointment booked, because I had a brownish discharge when my normal period should have occurred - (No blood at all) - I have now done 5 tests over the last 11 days but all have come back negative - I just want to know if this has happened to anyone else with a positive result?! I am really holding out hope that I am pregnant but slowly loosing hope as all the tests are coming back negative. Any and all feedback welcome 🙏🏼