As I got up from a 20 minute nap, went to kitchen to get pitcher to water plant, watered plant as i got up felt fizzy,lost balance, had to sit, sweating purfusivly, and very hot, felt nauseaus, felt i was about to have bowel movement. after approx. 15 mintes felt better, took shower. I had eaten approx. 4 hours ago a cheese sandwich, nothing else. This happpened one other time about 2 months ago. At that time had cramps along with same symptoms just described .