Dear Baby,
Your mom doesn't feel up to the task of taking care of you today. I think it would be good for you to know that your mom has depression and sometimes she may feel like she doesn't want you but it is not her speaking. It is this chemical imbalance inside of her that doesn't want you, not your mother. Sometimes this imbalance can overpower your mother and make her feel like she isn't going to take care of you like she should and that she is not a good mother. It takes over her and she tries her best to fight it but sometimes she can't.
But one thing your mom does promise you is that these will just be days at a time. The love your mother has for you will push through and will not be obstructed by the chemicals forever. At first you will have to recognize small signs, like an attempt at a smile towards you, a brief hug, or a extra cookie in your lunch box. You need to take these to mean that your mom is fighting to show you she loves you. Eventually she will be able to crawl out of the darkness that is in her mind and come and love you as much as she wants to.
Being a baby of a mom who has depression will be difficult but if you are half as strong as your mother you will make it and become a beautiful child with so much to offer the world. And maybe someday mom won't have this depression. Maybe someday she will not have to fight with her own mind and try to overcome these chemicals on a daily basis. Then you and mom can be together always.