If it hurts when you move it probably hurts when you breathe in which case the problem is muscular-skeletal. Probably a cramp or spasm in one of your intercostal muscles.
Your having growth pain in your boobs probably I've had them as well and it so much I couldn't even move eventually my ma asked what was wrong and I told my chest hurt and she told me I had growing pains and that it will pass.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.