Hello Indigoism
How are you doing?
I don't know if you've got as much helpful advice here as you hoped.
Unfortunately for pains like these I don't think there is all that much one can do, other than take it slower. It's a kind of purging that goes on. And if you feel yourself burnt out, you should really cut back.
Have you tried some back bending and twisting asanas (paschimottana, bhujangasana, ardhamatsyendrasana)? You might find some relief, even if temporary. I find them to work for a few hours, then the pain comes back.
Laying down in a relaxed position and being aware of the pain helps. I see this as a practice in itself. If I do it for significant amounts of time I trim back on sitting practices to avoid overload.
Hope you feel better soon.