Period late but still a BFN!

Dianna
Hey ladies so I'm nearly two weeks late and have been getting BFN , I don't ever get irregular periods. I got my last period on MARCH 7th glow predicted APRIL 9th but I still haven't got AF. My CM has been sticky clear white and I have no other symptoms of period coming.  Usually I feel sore tenderness in my breast and bloating but nothing. It's so frustrating because I honestly think I'm pregnant and I just took a test and negative once again 😒.  Has anyone ever had a negative at home test but blood work came back POSTIVE?