It's not just you, trust me. Whenever I get overheated I accelerate from a nice, easygoing, funloving person to nasty mood mode in warp speed...and the worst part is it feels as if my body is being possessed. LOL As soon as I cool down, I'm back to normal. I can feel it coming on so I do my best to cool down fast - I can't stand myself when I get in that mood!