Hello Temi, The shower is a place where we wash away the dirt from the body. He’s waiting for you means that there is sin in your life that you need to be rid of before God will grant you this hearts desire. This sin needs to be washed away before you can see this 2nd child.
Here is an article about confession of sins. If you go through these it may help you identify some areas:
https://missionariesofprayer.org/2010/03/important-role-confession-prayer/
