There is this video in one of Shinzen's youtube channels about working with intense emotions that I've found very helpful. I go back and watch it again from time to time when there is continuous unpleasantness in the body-mind. It's full of gold, and different techniques are mentioned for working with emotions and pain, so one might want to watch it more than once. Just watching it makes me feel a little better, to see the equanimity in Shinzen's face.
I thought others may find it helpful too.
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https://youtu.be/Azg0BrD9jGU

(Stephanie has intense emotions and Shinzen guides her to work with those emotions.)