If your in terrible pain you may consider a visit to the Emergency Room.
Sounds like something is up, not just your everyday post op problems.
I'm going for a surg. consult for a TAH BLO and have Endometriosis outside the pelvis. I've had numerous abdominal surgeries and each and every time had lasting debilitating effects from the surgery.
Some things pop to mind, one being adhesions and scar tissue. Two being a incisional hernia. Three what was the reason for the hysterectomy? Are you getting add back therapy?
Take Care and God Bless Hope your feeling better soon.
Take Care and God Bless