We felt this way, and sometimes still do! DD is 3 in July and we have another bub baking now, due in Nov. It is scary for us, but we knew we wanted more children- to see them keeping each other company will be such a blessing, so we're looking forward to that. So, we just jumped in (after waiting as long as we really could!) and as you say parenting will be difficult, there will be ups and downs, but people get through it (and manage to enjoy it in the process!).

Good luck with the decision!