You should be using 2 forms of birth control at the same time, and don't do that turning-the-condom-inside-out thing again. You are too young to be a momma, and condoms are good, but not great, as a form of protection.

BTW - In the U.S., you can buy a home pregnancy test kit in the local drug store. They are pretty accurate, and when I was trying to get pregnant, I used them right away when my period was late, and they accurately diagnosed me pregnant twice.