I've been told everyone heals differently. Study shows that the most improvements are made within the first year, but I've heard of cases where people recovered in their 2nd-3rd year. Even my neuropsych said that there should be signs of improvements by 8 months. Anyhow, my daughter still has PCS at this point and its been 9 months. I'm hoping for the best, but in the meantime, I find rest/coping strategies for her during this summer prior to school in the fall. The HRV biofeedback sounds promising, along with breathing exercises and good nutrition.

You might want to go to some support groups. I found the information and feedback very valuable. Don't give up! Try to rest or relax more.