If you’re feeling down, stressed, run-down, exhausted, or even fighting off a cold or flu, yin yoga is the best treatment. To yin or not too yin, that was the question I asked myself when I woke up early Sunday morning. I had made plans to hit up The Egg of The Universe in Rozelle, inner west of Sydney’s CBD with the bestie. The plan was to have brunch, chill and talk and then head-on into a yin yoga class, our favourite type. Of course, these plans were made before I picked up an icky bronchitis infection in the chest. So when I woke Sunday morning the question was, would…