Getting pregnant in high school

Me and my fiance have been together for a year and we are both ready to have a kid I have a job he can't right now to due a recent injury. Me and him have never had protective sex we are always just letting it happen and seeing what will happen. We will be graduated before the baby would even be coming and we are planing on getting married after we graduate this year. Do you think we are taking things to fast? I don't but a lot of people are but I know how secure our relationship is. Opinions?