I finally got over a bout of PCS and neck issues causing headaches and vertigo after 9 months, but have noticed that the smallest bump causes regression back into concussion symptoms that usually last a week or so. I have had roughly 6-7 concussions in my life, but find it odd that even the smallest tap on the head causes this. Does anyone else have this issue? If so, what can be done? Do I need to wear a helmet to sleep or what?