Give me your opinions

This my 3rd child with my bf soon to be husband(FEBRUARY 23,2017) CAN'T WAIT But we decided not to tell people until we actually in the hospital. Our family thinks we to young we 21, been together since we was 15(6 YEARS) Had our first when we was 16 , our second when we was 20 now we having our 3rd 5/29 we so ready we both works got a nice 3rd bedroom apartment we will be looking for our first house next year. But I hate that our family don't support us.