dizziness? What gives? I don't have fever, though my temp is low--96.8--which kind of tells me that I will have a fever, a very high fever. This started late last night, I thought I was just tired, but that's not it. Last night it was so bad, it was making me feel nauseous, this morning, it's not as bad yet. I feel very heavy, and kind of 'swimmy'. The dizziness is not as bad as it was, but earlier this morning I had woken up, and as soon as I sat up in bed, the dizziness and nausea started in. That was about 5:30. I do have a bit of a cough, but I smoke, so that's probably the reason for that. So what would cause a sudden onset of severe dizziness, so bad that it causes nausea?