That is very strange. I have had characters spend time in hospitals, but I tend to deposit them there, and then pick up the story when they emerge.

I am also a little confused as to what traumatized her so much that it changed her entire personality... Prim doesn't die until toward the end, right? Soldiers can do an entire tour of combat duty without lapsing into sleepy despair, so I don't get why doing the Hunger Games again would HAVE to do that to her. I don't but that it's realism. There is a very wide range of realistic reactions.