I am not sure what those short lines are, but you should have seen some veins starting at day 3. By this point the egg should be completely dark if it were going to hatch. Too me it looks like it never began developing or if it did, stopped very early. The air cell will get bigger on all eggs as they begin to dry up, regardless of whether the chick is developing or not.
Sorry, this egg is not going to hatch. I would open it up and see if it even started to develop.
Are you sure this egg came from a flock with a rooster? If not then for sure it wouldn't hatch because it wouldn't have been fertilized.