What's Next?

Sometimes, I wonder: Is there something bigger than the universe? I mean, thinks about it. We live in a state. That state is found in a country, which is found in a continent. That continent is found on a planet, which is part of a solar system. The solar system is part of a galaxy, which is a portion of a nebula. After a nebula, it's the universe. Doesn't that mean multiple universes should be part of something bigger?

Or on the flip side. It goes from atom, to proton, to electron, and to quark. But what makes a quark? Shouldn't there be something even smaller?

This is what keeps me up at night.