Really strange sleep. as if when i fall asleep i open my eyes 10 hours later?

I don't dream or anything. I fall asleep, and then it like I only slept for a second, but 10 hours has gone by. If it wasn't for my alarm clock I think I could sleep another 6 hours. Its not a good sleep at all, when I wake up I'm so groggy that I am a bit dizzy. Sometimes when I wake up its like... show more I don't dream or anything. I fall asleep, and then it like I only slept for a second, but 10 hours has gone by. If it wasn't for my alarm clock I think I could sleep another 6 hours. Its not a good sleep at all, when I wake up I'm so groggy that I am a bit dizzy. Sometimes when I wake up its like I'm in a fog. Any idea what's going on? Is this bad?
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