Internal laying is very common when hens get salpingitis. The eggs can go up the oviduct and out into the abdomen where they become solid masses. The wall of the abdomen can also develop a hernia occasionally. I would just try to get her eating and drinking, and keep her comfortable.
We decided to euthanize her since she just wasn't getting any better and not living a good quality of life at all. The mass was actually a mass of fat. Her insides were covered in fat as well. She wasn't my bird originally, I've only had her a few weeks.
Her liver looked very strange, like it had been chewed on? I have attached photos below.