Hi there your chances are the same as every other woman, As long as your getting your ovulation times right then it shouldn't take to long, There are items on the shelf to buy which can help with this if your certain on getting pregnant straight away. Ovulation sticks, folic acid, and pre pregnancy complete minerals and vitimins.
I became pregnant naturally with a set of twins when I was 18
Every month ANY women who has unprotected sex has a 25% chance of pregnancy, regardless of age.
I'm 18 also and have been trying to get pregnant for 4 months now. Did you get pregnant and if so how long did it take you?
I'm a day before my AF is due and I did a HPT and it was negative :( still holding onto hope that I still might be.