I don't know if anyone anwered your questions, but here is a short summary.
She may or may not have bulimia. She supposedly weighed about 115 pounds and was 5 ft 3 in. Sounds pretty normal to me. Evidently, no doctor had diagnosed her as having an eating disorder.
She didn't tell her parents, but she did tell her brother and her friends that she wanted to divorce her husband.
On the night she collapsed, she had been out with a girlfriend. The girlfriend thought she should not go home. Terri thought it would be ok and she would pretend to be asleep. Late that night after the husband came home, he called Terri's Dad and told him she had collapsed. I believe he told him that he thought she wasn't breathing. The Dad had to tell him to call 911. Michael had not called the paramedics. Her brother Bobby lived in the same apartment complex and rushed over. He said he found Michael sitting on the couch and Terri collapsed on the floor. Michael evidently did not try to perform CPR, although he knew how to.
A bone scan was conducted about a year after she was in her condition. Evidently, she had a lot of pain. It turned out she had multiple broken bones all over her body that her parents didn't know anything about. They did not even find out about the bone scan until years later. Michael would not let them see the medical records.
That's a sign of a bad marriage if the wife has to pretend to be asleep. Poor Terri.