Other things you could try to bring down your stress levels are guided relaxation/meditation or mindful breathing. There are lots of free podcasts you can get for this. I used many of them in my first few weeks of concussion.

Also, cognitive behavioral therapy may be helpful. If you cannot afford to see a psychotherapist who uses this approach, there is a book called The Feeling Good Handbook by David Burns that walks you through how to do it yourself.

I have found both of these techniques very helpful for managing stress, depression, and anxiety.