Sorry for the vagueness and your burnout. I'd look for a professional that specializes in burnout, barring that, a good physician would be the first place to start. There could be underlying health conditions you want to eliminate such as Hashimoto's thyroiditis or sub-clinical thyroid issues. You could have your cortisol levels tested to confirm your stress levels once underlying conditions are eliminated. From my personal research there's a lot of factors involved, stress the major trigger. It's serious and important enough you want to get a professional involved. Sending good energy your way.