Saddle/ coccydynia

[KnottedYet]

Saddle is one or more of the following:
too narrow at the sits
too domed over the top
too padded
too pear shaped and forcing you forward onto a narrower part.

It's all about causing pressure and tensile stress to the sacrotuberous ligament, and also to a lesser extent the other ligaments, that anchor on or near the coccyx.

I work in both a pelvic pain/continence program and do bike fits. There are PTs out there who have training in both, and have a strong interest in saddles and saddle fit. If you can find one to work with, before you go buying any new saddles or new shorts, that would be the best way to go. Your insurance should pay for a saddle fit or bike fit from a PT as part of your treatment.
(BTW, the complete opposite of all the above is a Brooks B67 or B68 [men's, not "Short"] saddle)