I agree with the previous post. I am 23, married for almost 2 years and we are considering having a baby this year. I am absolutely terrified about whether we can afford it, while still paying for a house, run a car and keep secure jobs? There is so much more to consider when having a baby.
When I was 15, I also had a strong urge to have a baby, but you really ought to think about the bigger picture. Try looking after a baby for a day, whilst budgeting for food,clothes and saving. Could you do it? i know I couldn't at 15.
The other thing to consider is obviously if your boyfriend wants to have a baby and how you are going to support it? PLEASE PLEASE do not claim benefits and make us hard working, tax payers pay for you.
Have a career, get a nice house and feel proud that you have worked hard and can provide your child (with a partner you want to spend your life with) with a life you can only dream about at the moment.