So putting science and untold literature aside for a moment. An entity existed before matter or time existed and was floating through nothingness with no origins, and what? It bears no relation to your religion...you are arguing about a paradox and your conclusions are mentally limited. Its clear that you have a fragility about you that has led you down a very unsophisticated belief system.
your framing your idea of a diety in human terms and your trying to apply causality when its unapplicable. you can say god doesnt exist, but you can not change the definition of god nor deny that god is, if he does exist, either eternal or self created. the CREATOR does not need a creator. supposing so is being outlandishly moronic as the very definition of "creator" is that which created everything... itself not withstanding.