Along with resting and breathing and a homeopathic remedy from my doc, I decided to start the five Tibetans again, and to re-read THE book on them, The Eye of Revelation. And things are looking up. It's important to do them slowly; see Ellen Woods' excellent video.
I did a workshop for my students on the 5 Tibetans last year? the year before? And one of them has been practicing them faithfully ever since - she looks and feels fabulous and full of energy.