Why Do I.............?

I'm only 12 years old and for some reason I want to have a baby! I have no idea why but I do! I don't want to have a baby just for the part, but I just want to be pregnant! I guess since my homeroom teacher just had a baby and one night I had a dream where I got pregnant by accident. I didn't even have with anyone. But why do you think I want to be pregnant so badly?