Sometime around 2006, I read a bookseries where the ending was so intense, sad, and incredibly different from where it was “supposed” to go, that I ended up crying throughout the whole night, and woke up sick with horrible cramp-like pains the next day. (They were not really cramps, but located somewhere in proximity to the solar plexus (if I recall correctly… Which I might no longer do)). I continued waking up sick with this horrible stomach ache every day for the next two months. Then it suddenly ended, two days before I finally got a doctor’s appointment, with no clue as to why.
Every now and then, the morning pains would make an unexpected return; always in the morning, for about 2-4 hours immidiately after waking up. During the worst of the first few months, I sometimes woke up hours before school started, just so I could lie in bed with the pains running their course, before dragging myself up in time for the first class.
I started some pretty weird (and probably unhealthy) eating habits to prevent these unexplainable pains, as it seemed eating a bunch of food in the evening, especially right before bedtime, eased the ache the next morning. But I never figured out what they were, or what really caused them.
Anyways; I vaguely recall re-reading the last chapter of the book many years later, and it wasn’t all that bad. It felt like blah fanfiction with a bad twist ending.
Debating whether or not to re-read the whole series again, since I remember loving it up ’til those very last chapters.