I suffer from dizziness, weakness, falling sensation when i sleep. what should i do?

Sleep symptoms: Your complaint does not explain if these are dreams or awake experiences. I would recommend a sleep study to make certain your oxygen supply remains intact overnight, and an evaluation of brain and its circulation to insure that there is not a narrowing in one of your neck arteries (vertebrals) that gets worse when you lie down, due to cervical degeneration.