Hi Kate,

You actually have a lot of therapeutic options available to you. Most of them are considered alternative therapies and aren't covered by insurance, but they do work for brain injuries. You can find a lot of info on google about these. Here is a list of them.

1. Neurofeedback
This is the process of training your brainwaves. It has been around
since the 1970's and has been used extensively to rehab brain
injuries. I would contact dr. diane stoler for this (just google her
name). She can help you or point you in the direction of someone who can.
2. Hyperbaric Oxygen Therapy
This has also been around for a while and has been used
extensively to treat brain injuries. If you are interested in this,
make sure you contact an independent place as the hospitals are
very expensive.
3. Vision Therapy
Only look into this if you are experiencing vision and balance
problems. Again, it has been around a while and has been used
extensively for brain injury rehab. Check out N.O.R.A. to find a
therapist.
4. Vitamin and Diet Therapy
Get a good B complex vitamin. You should also get on a fish oil
supplement. Eat lots of protein and cut down on the processed food
and simple carbohydrates.
5. Medication
There are some medications that are used extensively in Europe
and Asia to treat brain injuries. Doctors on the US haven't heard of these because they weren't taught about them in medical
school and because no drug company wants to push them through for FDA approval because the patents expired on them a long
time ago. They include:
A. Oxiracetam
B. Cerebrolysin
This is a bit more "hard core" because it has to be taken I/V or I/M. So, you would need your doctor to show you
how to do that. However, the studies that have been done on this drug have shown remarkable improvements in
symptoms.
C. Hydergene
6. Meditation

This is by far not an exhaustive list, but I think that these are the main therapies being used to treat brain injuries. Many neurologists, I would actually say that 99% of them, don't really know anything about concussions. So, take whatever your neurologist says with a grain of salt. The problem with brain injuries is that it is a very unconventional injury that doctors are still trying to treat in a conventional way.
So, good luck and rest assured that you can improve your condition.