How can I be sure I have been fully compensated?
The only way you can be sure you have gotten everything you have coming because of your work related injury is to ask somebody who is completely familiar with the law and your rights. That person should also be concerned with your rights, not the insurance company's rights or your employer's rights under the law.

Do not ask the worker's compensation insurance representative if you have more coming. Do not ask your company nurse or personnel people if you have more coming. Do not ask your foreman if you have more coming.

Do ask your union representative because if he or she can't answer your questions they will get you to somebody who can. Do ask somebody who deals with worker's compensation and represents injured workers on a regular basis.