it was the last sentence to focus on. The procedure is not determinate. You should find a urologist who specializes in IC . There is one here in San Diego. The one I see does not treat the Pelvic floor pain as as needing physical therapy but some do. There's a gal on the internet who goes through the whole 9 types and how to address it.
I also used pyridiaum and that was helpful before I got into the Instillation DMSO therapy.
you might want to watch these: https://www.youtube.com/@icnjill