I want a baby so bad?

I'm 15 years old and I want a child so badly. I'm not like most kids who say they want kids at this age, I mean I am seriously considering it. I've wanted a child since I was 12, like seriously wanted one. I don't have a job, but my mom did say if me or my sister ever had a kid, we have enough money to take care of it, and my parents would help until I am finished school. I don't mind doing 'poopy diapers' and I don't mind giving up my free time to take care of the baby. I actually want a baby so bad that I'm showing symptoms of pregnancy, but I know for a fact I'm not, since it's impossible that I am. But if I do have a child, I want to be able to assure it a good life. If I ever get a child I'd get a job as well. but I want advice, do you think I should?