While working under my car. I accidently pressed my hand on my S4 while lifting myself back up. Stupid me for leaving my it on the ground. Anyways, now I have a hairline crack across the upper screen, going slightly upward from the left to right edge. It's mostly noticable when the screen is off. It has to be under the top layer as it's still smooth to the touch. Everything working just fine. Should I worry much? Cause I don't plan on getting another phone until spring or summer.