Sure I wonder (not in those exact words though) But I reconcile those thoughts by coming to the conclusion that it was always that way. Gravity, matter, energy, cycles (the whole shabang) has always been there (here/everywhere). If I believed the laws of physics only existed, as we know them, at the whim of a higher being then I would have to believe they could be changed by the same whim. That would require a leap of faith that I, as of yet, have not been blessed with.
I would have to see evidence (for example) that all of the sudden an action no longer has an equal but opposite reaction anymore in order to believe what you do. And if that happened, boy would I believe. You betcha.
The universe is an immense mystery and truly understanding it is beyond the brainpower of our greatest scientists. In the end, it all leads to either meaning or meaninglessness. My best guess is there is meaning of a kind we cannot comprehend. And that, like the pre Big Bang or the unknowable inside of a black hole, begins to take on some of the attributes of an unknowable God who controls existence and nonexistence.