Should i wait until after school

So i am getting married next September and me and my fiance really want to have a baby. I am 20 and have been in school for two years now and feel like im not getting any where. I want to be a stay at home mom and own my own business but it is unacceptable to my family for me not to become a nurse! I even considered becoming a teacher and they instantly shot me down and told me how dumb i was. Well me and my fiance had a miscarriage about a year and a half ago and ever since then we really wanted to have a baby but its just not the best timming because we want to wait until im done with school. We were talking last night about how he wants to start trying during our honeymoon and so do I. Just need some advice or helpful comments on whether we are jumping the gun or not. P.s. we will be together for almost 7 years when we get married so i am pretty sure he is the one :)