I cannot answer your first question, but I imagine it depends of the nature of injury/injuries, and how much rest you are able to get, I needed 5 months off work and a phased return to work.

One case of PCS cannot really be compared to another. I am nearly 8 months on and now have infrequent headaches, fatigue and sore eyes. The symptoms diminish but it takes a long time.

I am working, leading a full life and more recently exercising for 30 minutes three times a week in the gym. It is all progress.

To answer your second question, I have found Cymbalta very helpful in preventing headaches. It seems very strong at first, causes nausea, constipation and in my case diarrhea. Most of these symptoms should settle in two weeks. Without the Cymbalta I wouldn't be were I am now. If I have a headache which will not go I use Imigran and it goes away instantly.