Weird health issue. Help?

So i was on my way back from school. I'm physically tired, and mentally. It is also really hot plus i barley ate or drank water. About mid-way my pinkys, forearms, and as it got worse my abdomen started getting numb and my hands shook a bit and I felt like I was going to pass out. I pulled into the nearest builing and drank water cooled off and felt better. Did I nearly get a heat stroke? Looking it up numbness aren't symptoms. I still feel a little crappy but much better. I'm not sure if I should go to the E.R because there were so many things that could of caused it. Plus I had a cigarette like 20 minutes before. I'm kind of scared