Advice please??

So my fiancé and I have been together for 2 years and plan on getting married in June. He’s really been wanting another baby and in all honestly so do I but I don’t know if I should wait until we are married or not. He has a 5 year old little girl and I love her with all of my heart and soul but I feel like if I get pregnant then I’m going to have to wait on the wedding. At the same time we have a very active sex life and have been trying for a baby for about a year now. I don’t know what to do. I need help?!?!