I have hens that are almost two and have been laying for quit some time and they will occasionally lay eggs that look like something that should be in a wild birds nest. They usually are full of the eg white. None of them seem worse for wear, I really won't worry about it.
Wait until she gets older. Every once in a while you will get a double yoker. A friend of mine had a hen lay one that was almost twice the size of her jumbos. Her husband was so surprised, he took a picture.