Hi JoannBC,

It is not a good idea to return to work, or any other type of activity, until your symptoms have subsided. Your symptoms are an indication of whether or not your brain has healed from your injury(ies). Since you are 10 months past your last concussion, you will probably need therapeutic intervention to get any further healing. The ones that I recommend are:

-Hormone Testing
You are doing this to asses pituitary and/or hypothalamus functioning. If
you have a lawsuit pending, your attorney should be able to get these
done for you. Have him/her consult with a specialist in hormone
replacement therapy.
-LENS neurofeedback
You can google this on your own. It is an FDA registered device and is
currently being considered by the Veterans Administration for use on TBI
combat vets.
-Vestibular Rehab
This can be done by a physical therapist who specializes in vestibular
rehab or by a neurochiropractor. If you have balance problems and vertigo,
this would be a good option for you.
-Vision Therapy
If you have vision problems (double vision, reading problems, one teaming,
etc.) then you should seek out a vision therapist.

Also, read Dr. Larsen's "The Healing Power of Neurofeedback." You can get it at your local library. In that book, he discusses a case study of a woman who had sustained 4 concussions with the last one being a very brutal one. He successfully rehabilitated her brain and she was able to lead a productive life.

Good Luck!