First of all, you guys make me really excited to experience my little sister's mood swings (not!).
Second of all, if you're 15 and you think you want a baby. You're lonely or bored. Either hang out with friends or talk with a therapist. Either way, you need to find something to take your mind off of it because you are nowhere near ready for a baby. I thought I was starting at 13, and sometimes I still do. What did I do about it? I babysat. I now babysit for about 8 hours a day at least 3 days a week! I can go there thinking "oh, babies are so cute, I want one now!" but I always leave thinking, "geez, i'm so tired! I can't wait to pass out on my bed!" it's always a good feeling at the end of the day to be able to hand them over to their parents! It's a tough job, but there are some teen-moms who have to do it because of mistakes (or low self-esteems).