planning our 4th and final child

Loretta
Our baby fever has risen! Our social media page is filled with bAby boys and baby girls. We decided we wanted to try for our fourth and final child! At the moment we have 3 boys whom are all about to turn of age! Our oldest will be 10, November 7th, next our son will be 8, December 29th, and Finally our baby boy will be 4, October 4th! My husband and I just celebrated our birthday on August 23rd, I turned 33 and he 38! Yes we have the same birthday! Many ask us if we want to try for a girl, and naturally we do, However any gender Our Creator blesses us with, should he grant us our wish of conceiving again, will be a blessing in its own! 
Its been a while since I've been pregnant, and we are now in a routine of sleep, no diapers, not having to take bottles diapers change of clothes, etc etc! I worry that I may not be ready for this all over again! But the thought that I may finally have my princess, makes the process all worth while! 
Any suggestions on how to re-prepare?