Confused/20 days late

Josie

I’m currently on cycle day 50. AF was due on the 13th of June,never showed. Tested the first week of missed period maybe 4 times all BFN. Tested on 13th day of missed period afternoon, BFN. Then the next day with FMU BFN. Should I retest now? Is there still a chance? Has anyone else experienced this?