This morning I got up and walked to the bathroom, then immediately had to rush back and lie down (hyperventilating) due to a sudden wave of overwhelming lightheadedness and nausea.

Again!  It happened the other week as well.

After plucking up the courage to get up again, I had a sip of water, and as a result was bent over the toilet retching for the following 10 minutes.

Fackin' great!

Now I'm fine.