I am a 52 year old woman, in generally good health. This morning, while sitting, I came extremely close to passing out. I laid down until the feeling passed, then got up and moved around. I continued to feel dizzy, and after a few minutes, I vomitted. I have continued to feel dizzy the rest of the day, and have had to be very careful to move slowly. Balance is poor as well. I have felt chilled all afternoon, and my thermometer says my temperature is 98.5. I have never felt like this before, and am very confused about what could be causing this.