I have been suffering from dizziness since 7 months. Sometimes the dizziness leads to a panic attack with limited symptoms. There is extreme fear but I have not noticed hyperventilation or anything else. I have never passed out in my life. The sensation I get is that the ground beneath my feet is shaking which leads to extreme fear. The harder I think about this sensation the nastier it becomes. It leads me no other choice but to stop whatever I am doing at the moment and start moving. Moving constantly somewhat eases this sensation. This dizziness never stops and is there with me 24 hours a day. Sleeping is the only escape. Also I have never experienced spinning vertigo. This sensation strikes the worst when I am sitting still and doing something like staring at the monitor or reading a book. Nausea is also present sometimes.