[QUOTE=KnottedYet;520966]Measure your sit bones.

Seriously. I work in pelvic rehab AND do bike fits. I'm totally obsessed with saddle fit and what a poor fit does to women.

I really hope your PT has advanced training in pelvic floor work. (trained by Kathe Wallace is a good sign, and yes, it's spelled "Kathe"). It would also be nice if they were trained in bike fitting (Michael Sylvester, Andy Pruitt, or Eric Moen are very good names, and teach all across the US.) I would also be ecstatic if your PT was cognizant of coccygeal dysfunction/derangement. Sounds like you've got it.

I think before you spring for a custom saddle, you really need to first find a commercial one that fits you. I do have to wonder if you have wider sit bones than can be supported by the saddles you've used, and your coccyx is getting wolloped via the tendons that anchor there because the saddles you've been on cause you to weightbear on the tendons of the floor rather than on the ischial tuberosities.

I could be completely wrong...

But please measure your sit bones!

(ETA: I assume you've already been cleared of celiac disease for the L.S.)[/QUOTE]

KnottedYet, I'm always so happy when medical personnel are cognizant about the inpact of celiac and its interaction with other conditions. I have celiac and I swear that docs just think it's a "food-allergy" instead of an autoimmune disease that impacts many body systems and causes or interacts with many other conditions. Kudos to you to mentioning it!