Often that is the case, symptoms increase for awhile..
How long or if long term , no one can say, just too many variables.

Best tips are be gentle to yourself, don't push beyond what you can tolerate with no symptoms increase. Sometimes that is a learning curve.
Eat nutritious foods, cut out junk/booze etc.
Limit loud places, visual overload, aim for relaxation and calmness as much as possible.

the useful stickies are above on the main PCS/TBI main page.-
http://neurotalk.psychcentral.com/forum92.html


you may want to consider upper cervical adjusting,and/ or a very good gentle chiropractor..