If I may...
I only heard the notion of intelligent design this week.
Being an ardent believer in creation, I listened to the idea and concluded that it is nothing more than a watered down version of creation, one which advocates the same basic tenets but without the notion of God being the author, instead simply a "higher power".
To me, that translates to the same thing. I know AA and other programs refer to a "higher power" as a PC way of saying God. Or a way to make the atheists feel included in AA without them having to compromise their non-belief in God.
Therefore, to me intelligent design IS creation, with the notable exclusion of the word God. I see it as a compromised version of creation. Hence, intelligent design IS creation with a PC twist. Clever, eh?
Raven, in answer to your inquiry...that is one of the questions I grappled with for a long time. I will admit...despite the fact that I am a Christian, I have an enormous issue with the entire notion of infinity. It frankly frightens me to try and conceive the entire notion of anything being endless, and thus presumably beginning-less. I still am not 100% comfortable with the idea. I have asked the same question you ask many many times. It snags in the logic chambers of my brain. I ask, "If the notion of Christians being saved to heaven, and being there forever, time without end, is correct...then why were we created at all? What will we do in heaven forever and ever?" It keeps me up at night when I dwell on it. My mind simnply cannot fathom the concept of infinity. This leads to questions about where God came from, the nature of His existence...things you and others ask often.
I do not have an answer to those questions. I can only pass along the things I have been told when I ask them. I am sure they will not provide you with any real sense of having the question answered, but it's all I have ever been able to learn on the topic.
All I can say to the issue is...God is. He is infinite, He was there in the beginning and will be there in the end. He is alpha and Omega. Simply put, God is God.
That will most likely not be an acceptable answer to your question, but it's all I have. Accept it or deny it as you will. Hopefully someone else can answer this better than I.