I'm 18 years old and I really want to have a baby?

I woul like to have a baby so badly. I was pregnant 11 months ago, but my mother didnt want me to have the baby so i had an abortion. It was the biggest mistake of my life and now i really want to get pregnant again. The question is though how do i stop feeling like this? i baby sit on a regular basis and sometimes it makes me want to have a baby even more. what can i do to stop feeling like this?