I know its normal for drywall seams to crack but I have an area over a doorway header that is cracked on each side (opposite sides) at the corner of the header. The cracks start under the casing trim and run diagonally about 6 inches length. There doesn't seem to be any drywall seams there. The house was built about 2 years ago. Is this normal? Could it be a response to a load on that point? Should I be concerned? Thanks.