I know I'm probably overstressing about this, but I'm sure a lot of PCS sufferers can relate to that. I need some reassurance and I wanted to ask you guys after lurking on the forum for a while and noticing how nice of a community this is.

Last night I was hanging out with friends at a get-together. A friend of mine walked into the apartment, I cracked a joke about him and a few seconds later he slapped/pushed me in the back with both hands on my shoulders. I was in a seated position and I went forward a bit since it was an unexpected and firm slap/push. The whole night and this morning I kept thinking as to whether it may have made my head worse by giving me whiplash or something. I'm so sick of overstressing about stuff I'd not think twice about in my pre-PCS condition, but here I am asking this anyway..