9 months post hysterectomy: still hurts to sit all day

I am 9 months after my surgery now. I have hadpain in my bottom since returning to work after 3rd week. I have been to several docs and even the orthopedic dr. Talked with oncologist that did ssurgery and they insist not from surgery. I never hurt before. I dont hurt much on the weekends when not working. They have suggested pelvic physical therapy to try since nothing else working. I cant afford it. It is $60 a visit. Anyone else having this issue. I have had xray and mri and nothing showing that would cause pain in my bottom when sitting. It feels bruised all the the time. Hust weird thay never hurt before surgery. I have actually hurt sj nice cold knife procedure 6 weeks before the hysterectomy. Any suggestions?

I noticed that I couldn't sit on the chair I normally sit on at work. They bought me a new one which is softer. It just make my butt hurt. Maybe a new chair now??