Plan B is suppose to work up to 72 hrs after unprotected sex or contraceptive failure. It works better the sooner you take Plan B. Here is the Plan B website FAQ's read through those and browse other parts of the website maybe you can get all the ansers you need.
Also stress will make your period fall behind, if you are stressed about being pregnant it will make your period late so it may put your mind at rest to just get a test and check. http://www.planbonestep.com/plan-b-faq.a...
Plan B is infamous for messing up your cycle - I wouldn't stress too much.
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.