Where did God come from?

Dont yell at me for being I guess kind of Atheist but yea I dont believe in god. I do believe there could have been a god and that he was real at one time and famous to a point of a ruler or something. I have never read the bible and never will it dont interests me and wont change my views if I do. I thought Columbus discovered America…..wheres his mother. Everyone has to have a mother I mean you have to be born from something and be in a womb. So I dont get the whole point of God because he had to of had a mother. I dont get the whole part of how the world got created and how people animals and other things did but its all a mystery. Ive always wondered if some people know when they are going to die and when its there time to go. There was this thing on the internet I saw about a little girl that had a brain tumor and it was in a spot they couldnt take it out her mother knew she would die and when it got closer to the girls time to leave this life she told her mom she had to go to school to say goodbye to everyone and in the night when she went to bed she would “leave” or passaway. Its all a mystery and unsolved. Maybe thats the way it will always be who knows.