First born

My body never went further than 3 months pregnant, I just found out I'm pregnant with another child, this is my third pregnancy, I want to wait until I'm further than 3 months to tell people but I'm also afraid because I live with my parents, and I feel like I need to move in with the father of the baby, we are engaged, but we were waiting until I'm done school which won't be until October and I'm due November, any suggestions?