2 invalid tests.... 2 different brands.

I am now 10 days late and no sign of AF. Took a cheapie test earlier in the week and the control line never showed and therefore was invalid... figured I'd wait out the week and test with the digital I had. Used a clear blue digital weeks estimator one and the little hour glass did it's thing and then disappeared and nothing ever showed!! Seriously! So frustrated and don't want to go buy more tests!