So today at work I started getting super hot and dizzy and int vision started going black around the edges and I could only see through the center. I ate breakfast and lunch and again before I left for work and understand that I am not normally sensitive to heat and I was drinking plenty of water. It was only about 80 degrees and i wasn't doping anything very physical. I'm 17 in a few weeks and have never has this happen before so any help would be nice