2013 MAZDA CX-5 Visibilitywindshield Problems

I WAS DRIVING ON THE HIGHWAY AND I HEARD A SUDDEN SNAP LIKE SOUND ON THE WINDSCREEN, THEN I SAW A STAR SHAPED STONE CHIP APPEAR ON THE WINDSCREEN, ON THE RIGHT SIDE ABOUT AN 1 INCH FROM THE SIDE AND ABOUT 7 INCHES FROM THE BOTTOM OF THE WINDSCREEN. I HAD DRIVEN NO MORE THAN ABOUT 100 FEET, WHEN A CRACK ABOUT 12 INCHES WAS ALREADY THERE. MY WARRANTY COVERS STONE CHIPS AND CRACKS LESS THAN 6 INCHES. THERE SEEM TO BE A DEFECT WITH THE CX 5 WINDSCREENS, BECAUSE I HAVE SEEM SIMILAR COMPLAINTS BY OTHER OWNERS IN FORUMS. OTHER VEHICLES YOU GET A STONE CHIP AND IT DOES NOT SPREAD THAT QUICKLY, AT LEAST YOU GET A OPPORTUNITY TO GO AND GET IT REPAIRED. I DID NOT EVEN GET AN OPPORTUNITY TO EXIT THE HIGHWAY AND THE STONE CHIP HAD ALREADY SPREAD IN EXCESS OF 12 INCHES....

WE BOUGHT OUR CX-5 IN APRIL 2013. LAST NIGHT WHEN I WENT TO GET IN MY CAR I NOTICED A CRACK IN THE BOTTOM MIDDLE OF THE WINDSHIELD ITS ABOUT 12 INCHES LONG AND CURVES LIKE A HOOK. WHEN I PARKED MY CX-5 THERE WAS NO CRACK. WHEN WE CALLED DEALER WHERE WE BOUGHT THE CAR HE STATED "A ROCK HIT IT" WITHOUT EVEN LOOKING AT THE CRACK. MY HUSBAND LET HIM KNOW THAT A ROCK DID NOT HIT THE WINDSHIELD AS IT WAS SITTING IN OUR YARD. I AM WORRIED THAT IF I TAKE MY CAR UP TO THE DEALERSHIP THEY WILL DO THE PEN TEST AND STATE THAT IT WAS CAUSED BY A ROCK. THERE ARE NO STARS OR CHIPS ON THE WINDSHIELD. WOULD LIKE TO KNOW IF THERE IS A WAY TO CONFIRM THIS CRACK BEFORE THEY DO A PEN TEST? *TR