9 days Late??

Emily

I am 9 days late. I’ve had a history of irregular periods, more tho when I was on birth control. I have been off birth control for about 2 years. I’ve been regular and haven’t really had issues but my periods are heavy. I’m 9 days late & idk why. I do use protection with my husband. I’ve taken 2 tests ( last week ) and negative. Any thoughts??