Apart from the flashbacks going in a little clumsily, I feel like some part is missing in here....
I think she has been losing sleep because she is constantly checking over the amount of medicine pills, in case someone is taking tham secretly.... I also think there is something in between suicide and negligence going on. After the time, people get used to the war, the gore, they don't feel much anymore after seeing injured or dead people, likewise they get tired of getting hurt and then getting treated and then getting hurt again. I think it's a kind of fatigue... fatigues of living in this kind of environment - that leads to suicide or unplanned mishaps.