Today morning I heard a loud cracking/snapping type of sound when driving my '13 Accord and after a few minutes noticed this crack on the windshield, driver's side. Size of the crack is ~6" right now. Strange thing is when I first noticed it was only about 3" starting from the left then it grew by the minute. In about 2 hours it grew to 6" and started curving downwards. From the outside when I touch the roundish spot where it seems to start I dont feel a pit or anything. Just a little roughness. I would imagine if it is a rock chip it would have some kind of impact crater ? So what do you think might be gong on here ? Could this be a potential warranty claim ? Insurance claim ? And most importantly what is the risk ? Should I stop driving it ? I mean the crack is increasing even when the car is just sitting.