Amanda, if you have your test results you can email them to me and I'll look up the association.
If you can get your doctor to write a prescription for an occupational therapist, they can come to your workplace and evaluate your daily tasks, then show what you can do to make it easier on your muscles. Sometimes they suggest some adaptive equipment or do a functional capacity evaluation to determine how much you can lift, how long you can stand, etc. It will also give credibility to your challenges with coworkers and supervisors.
This describes the FCE - it's good to have, even if you just use it as a baseline in case you get injured later: Functional Capacity Evaluation