I want a baby

I'm 17 and I know this is bad but my boyfriend and I have been talking about how we really want kids and I really dont want to wait. We have a lot of money saved for moving out and getting started so I don't think it's an issue. I know kids are expensive and I know what I'm getting into because I helped raise my best friends baby, my God son. I have a healthy relationship with my boyfriend and I know it's going to last.