WHERE THE F**K IS MY PERIOD!?

Rachel
PLEASE READ AND HELP A GIRL OUT! Okay so about two months ago I decided to stop taking my BC (tri lo sprintec) pills for a few reasons...anyway, I've had one period in June which was normal and only a few days late..now it's July and my period is over a week late and it's almost 40 days since my last period!!! All my sex within that time has been condoms but I decided to take pregnancy tests anyway today because my period has never been this late, anyway the tests say NO-, so WHERE THE HECK IS MY PERIOD?! Has anyone had irregular periods after getting off BC? I'm getting super worried now..any comments are appreciated!