I've never had heat stroke but I have had heat exhaustion before (I think everyone that lives in Az gets it at one time or another!). Heat stroke is something very serious, just as serious as any other stroke it can cause seizures and even lead to brain damage if it severe enough.

My dad had a heat stroke was, it was scary to watch. He just passed out and was unconscious, we had to call an ambulance to pick him up.

When I first moved out here for college I remember seeing posters everywhere in the dorms about heat exhaustion/stroke. At first I thought it was silly, but then I realized how important knowing about it was when you live in the desert. Always remember to drink plenty of water, if you start to feel thirtsy that means you are already dehydrated!

If you haven't been drinking water since you got home you should start drinking, make sure it's cool but not cold as it will cause a shock to your system. From what you describe it sounds like you might still be dehydrated.