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What is this called in English (read please)?

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I know the name for this in my language but don't know what it's called in English. When i'm sleeping sometimes it feels like i'm awake and sense stuff around me and hear stuff it's kind like i'm hallucinating. When i try to wake up i Can't; i try getting up but it feels like i'm being forced down. It's horrible it usually happens when i am tired and go to sleep late but sometimes it just happens randomly. Any idea what it is??? By the way it's called "Aaithan" in my language Jitesh here should know it we from the same country haha.