Are multiverses real according to Buddhism

i have heard that buddism also says that multiverse exists. So, i want to ask something. Before few weeks, i saw two dreams in which I was totally aware of myself and at that time at those places, i can clearly feel that whatever I was experiencing, they are Real. In other word, if somebody would have come at that time and told me, this is your dream, than i would have laughed to much. In other words, I can still remember all the detail of that place(dream) and time, the detail of my hands etc. How can this be possible? As I've heard that worlds are just state of mind, similarly dream also. So does that makes, the dream world also as a real world, if a person is always their? Can I again feel such experience? That was very cool, I can still remember that. Before sleeping that night, I was thinking about how multiverse is possible, which I think sometime a because these things are very cool, specially from spirtual path. Were those two of the universe(world) among infinite other universe?