Is life a dream?

I have always had that ‘what if’ feeling when I was a kid. Since I’ve had dreams inside of dreams before, I think that what if I’m in a dream and I just dream inside of the dream that I’m living in. If you think about it, when we dream, we think we are experiencing reality. And when we wake up, we say this is reality. Maybe there is no reality, and we seem to think that what we are experiencing is real. Maybe the universe has billions of dreams at once and each of us are a dream. But that is just a theory, and I’m sorry if it didn’t make much sense.