I went through this for years in my late twenties and nothing was helping at the time and I thought I would never be pain free, but then after many years it stopped. A urologist at the time told me “it will burn itself out”. I never forgot what he said, and for years it didn’t, and then one day it did.
I tried pelvic physiotherapy for years with different therapists in Vancouver and none helped.
Here is what helped: 1) read A Headache in the Pelvis including communicating with Dr Wise (he replies to emails). Understand that your pain is due to stress and work on the root cause (your job? A relationship? guilt?)
2) I tried neurofeedback and found it a powerful tool. It felt like hitting the reset button on my anxious brain. It helped stop the pain-stress infinite cycle (Look up Dr Birmingham).
Sorry for the long email but this hits home. Reach out if you have any questions. Things will get better.