Asking a question is OK as long as the intention is to find the truth not to cause/ create anarchy. Your question is a logical one and many of us "humans" think about that, because our knowledge and understanding of things is based on Science (that means observation). So in our world everything needs to have a beginning and an end.
Our capacity of comprehension comes to an absolute halt even while "understanding" our daily used language. Look at the example below, try to understand them and then consider God who created the Universe.
We commonly say," forever, nothing". What is actually forever and nothing? I personally have been completely unable to know what is NOTHING, " a bottle with vacuum has NOTHING"; " God lives FOREVER"; "Heaven and Hell are FOREVER".
The point is we are not capable of understanding God, but asking for fair reason is well.
Saalam