Be careful with self-diagnosis, especially PTSD. Even the pros are divided about PTSD. Reading about a disorder can easily lead just about anyone with unexplained symptoms to self-diagnose with that disorder.

With PCS, it is a cluster of symptoms that follow a concussive event. Only the symptoms are treated with PCS. There is no generalized treatment for PCS, just 'non-treatment' of rest, rest and more rest. Pain killer for the head aches, etc.