Parents of 3+

Welcome to my small panic attack.  Little bio, I am a mother to three girls ages 4,6, and 11.  My 11 yo is my step daughter whom we raise completely.  Last month we had a pregnancy scare, or at least to me, but dear husband confessed for the first time ever that he wants another child!!??? Where did this come from? Anywho, jump to this month and take a look below. Yep, we BD on my most fertile day, almost all of them.  I am now in shock that I could really be pregnant.  I know no one who has more than 2 kids.  I myself was an only child.  But there is always that small little itch, the one that slows me down right past the newborn clothes and diapers. But then panic sets in.  Our car is too small for another child, our new house doesn't have a nursery or extra room.  It is a 3 bed and the little girls bunk.  How will I have enough energy to do it again? ? ?  Oh how I would love a little encouragement or words of wisdom from you fellow glowers with larger families!​