Are there any good theories about how the universe began

When I was young (raised Catholic), I always wondered where God came from and was told he was always there. I don`t believe in God anymore, but I`m still perplexed by the idea that something was always there. I suppose at some point there must be something that was always there and led to other things happening and coming into existance, but i just can`t wrap my mind around it.

I just watched a documentary on this with Stephen Hawking.

He said that there wasn't any time for a God to have existed. Because in the beginning there was no time. It makes sense, but what if time isn't the only way to measure existence? I'm an Agnostic, born and raised Christian. I'm only 14 years old, but I've come to realize nothing has proved to me that there was a God. Also, nothing to prove to me that there isn't one.

Here is the documentary:
http://www.youtube.com/watch?v=WQhd05ZVY…

The theory of the creation of the universe can be simply answered by the mind boggling answer of quantum fluctuation, Quantum fluctuation is still not understood completely as it defies the laws of physics but it can be put as energy being created from "Nothing". This is the confusing part about it because something can't be made from nothing. The universe is finite which means there is an ending, if it was infinite it would no longer need an explination because infinite has no ending nor a beginning. But its not so we can only guess and hypothesize how the energy vacuum (quantum fluctuation) was made.

Not yet, right now all we got is just random hypothesis about the begenning of universe.
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Actually humans r unable to visualise the fourth dimension, which is a huge setback for us, its like watching tv on mute and trying to figure out whats being said,
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so unless we make machines which visualise fourth dimension and work on it we are handicapped sort of.