What Could Cause Dizziness, Rise In Temperature And Hot Flashes?

I was sitting at my desk talking to a colleague when all of a sudden a bofy heated up greatly from my back to head and chest. I felt dizzy and my vision had white spots that appeared, almost like I was going to faint. That lasted about 4 minutes. Then I felt a a very slight pain in my chest that has lasted about 20 minuties now almost gone. My head, neck, back and arm muscles now feel very sore, my head feels congested and aches. I have had two more "hot flashes since" and my eyes feel like they are darting around. I am male, 40 years of age and in general good health. Not on anymedication and have not done ant strenuous acitivivites latetley, I have eaten today. Any assisstance you can provide would be appreciated.