IPhone 4s email problems

Okay, so I want to buy a couple books off of my iBooks and it says that I have to answer 2 security questions. I don't remember the answers, so I went to the link if you don't remember. It then says that an email was sent to my email, and nothing is in my inbox. I know it is the right email, so don't tell me that. It's not showing up on my mail app on my phone and I even checked on my computer and NOTHING is showing up. I don't know what to do! Somebody help! 10 points!

Added (1). Its not in the junk mail.i've checked there too

Go to Junk Mail. I promise you it's there.