It has been a few weeks since your posting, have you contacted your doctor about a referral for pain management or additional therapy?
It sounds like you perhaps didn't do your exercises regularly after surgery and you now have scar tissue to deal with. It will be very tough to manage your pain long-term without addressing the root cause.
I understand the need to keep your job, but is there any way to adjust work hours once a week to do PT? Or can you find a PT clinic that offers early, late, or Saturday hours?