I believe my PF is due to my last job where I sometimes stood on my feet 12-15 hours at a time. Many times there was not even a chair to sit down on and since I worked alone there were no breaks.
I think you are smart to document everything regarading this should you need it in the future. A paper trail is really important if and when you need to retain an attorney as I did. Make sure you have copies of the original report of work injury and any correspondence between you, the insurance carrier and your employer regarding this. The more documentation regarding your complaints, the better.
Best of luck.