the symptoms you described happen often in people that work out without drinking enough water. even if you think you're drinking plenty try drinking more and see what happens.
after i do work in high heat i get painful throbbing in my inner ears and inner head also sever headaches! . i also get such a painful headache i can't bend over without feeling excruciating pain and nausea. could this be do to the heat or something wrong in my head?