heat, sweat, dehydration, sees nothing but white. What happened?

I was playing tennis for about an hour in VERY hot (over 90 degrees F) weather. I didn't drink a lot of water. When we were sitting down after our game, I became VERY dizzy and neauseous. At first, everything was just very white, and I could make out some colors. Then, I couldn't see anything at all, except for white. I could hardly walk, and I kept on falling down (a total number of 4 times). After I got home, I vomited.
What is wrong with me?

My girlfriend keeps nagging me to give blood as I apparently have quite rare blood (AB-) Is she right to?

Answers:
heat exhaustion

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This is very strange because this happened to me about an hour ago. But I was taking a bike ride with my neices and it was 95 here and I didn't drink anything and I like blacked out when I got home.

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heat stroke. drink plenty of cool liquids, and take a cool shower. You should have been taken to emerg, not home.

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Heat stroke or exhaustion. I have done that also before. Drink LOTS of water and lay down for a long time. Let your body recuperate.

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You are dying of STUPIDITY!

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Judith R, until you actually get your GED, don't come on here spouting off things you know nothing about. It is NOT heat stroke. Perhaps some heat exhaustion. Most likely just heat related illness/cramps/etc. You do not sweat when you are in heat stroke.

Why didn't you go get medical treatment? Personally, I wouldn't think of coming onto Yahoo and asking these dumba*ses first.

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heat, sweat, dehydration, sees nothing but white. What happened?

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