CMJ's Trying To Conceive Wish

My husband and I have a wonderful little girl and we have been trying for 9 months now to conceive.Our little girl wants to have a baby brother or sister so badly.I am alittle discouraged because everybody around me is having babies and Im not.It's not that I am jealous,just confused why it hasn't happened.I tell myself it will happen in God's time-but it is still hard to keep my mind on that! Pray for me-that I may renew my mind and my faith in the Lord will become stronger!He has a plan for me