Anxiety is a common thread amongst PCS sufferers. It's like concussion amplifies any lurking fears and brings them to the surface. I used to almost have panic attacks for the first couple of months and even now I occasionally get anxious for no apparent reason. Anxiety and depression are the evil twins so I would look out for both. You are relatively young so with the right combination of rest and exercise I think you stand a good chance of full recovery. Just make sure you don't have any more concussions and don't try and rush recovery as the brain cannot be rushed. I would avoid working overtime that's for sure.