u know, there are some questions that human mind can't answer or imagining the answers such as who created god?, how the heaven or hell looks like?, or what was there before the big bang theory?. Some questions we usually ask without having any idea what the answer would be, but once we got the answer, it might make sense and it might not. in case it does make sense than it's good, it means it's clear now. however, what if it does not make any sense?? we should ask why it does not make any sense. well, the answer for that is because any thing makes sense or any thing we can imagine is based on experiences that we'v been through in our life. that's why even people who believe in the existing of god wouldn't ask such questions because they know that they'v never been through such a thing. that's what i believe.
God is the Alpha (beginning) and the Omega (the end). There was nothing before God because God exists outside of time, He is not bound to any place or time. It's a difficult concept to grasp, and don't feel bad if you don't understand it because very few people do.