Parallel Universe

Do you believe in parallel universe? Do you sometimes think what you are in that universe? I always thought to myself that we are not the only universe present in this world but there are many more out there. I read some article about parallel universe it says that dreaming can be a door for us to see what we are in that parallel universe, maybe that place that keeps reoccurring in our dreams was the place our parallel self belongs. There still so many mysteries unsolve in this world and many questions thats hard to know the answers.