What If?

What if the modern knowledge of our universe changed. What if planet earth and the vastness of the ever expanding universe was a part of something greater. If it was all compressed into a small atom of say a leaf cell of a far bigger planet, and thus a far bigger galaxy making an infinite amount of planets and universes that could be bigger or smaller than ours. Just think of how big our universe is and then how big space is, and try to comprehend it being compressed into a small cell of something on a planet trillions and trillions of times larger than ours. The volume of "space" (or room), able to hold everything in it is not comprehdable. I suppose the term "space" or amount of room that could hold everything together would be non existant. Think of a house, and how big that house would have to be to hold an object(s) that would have an unlimited amount of mass.