I think you need to start a yoga class again. You had less pain when you were going! Tomorrow 9:30 - 10:30 with Sara, give it a try?!
And also the week in Davos will be good, xc-skiing every day will strengthen your core and back.
Merci, yes, I have the intention to do more yoga and am looking forward to Davos and cross-country skiing every day, I hope.