Me and my fiancé are trying to get pregnant with our first baby. I am 18 so im young, but we are engaged and live on our own (with NOONE else, we own our place) and we work and have cars and we really want to make this little addition! But, how long until I should worry about fertility? We have only been trying for two months, but all these teenage girls get pregnant all the time and I thought it would be easy for me! Any advice?