You have PCS. Your increased struggles with anxiety mimic PTSD but are not necessarily PTSD. Some believe prolonged concussion symptoms cause PTSD. I am not in that camp. PCS can cause so many of the PTSD symptoms that doctors struggle to discern a difference. PTSD can make PCS symptoms much worse. This is why help with anxiety is so valuable. btw. I was diagnosed with PTSD 14 years ago after being assaulted by a cop. It took a few years to recover but I can see a big difference between PTSD and simple PCS.

Have you been offered any therapy, such a CBT (Cognitive Behavioral Therapy)? It can be a big help. You think too much and need some help redirecting your thinking. You need help recognizing hoof beats as horses, not zebras. A good therapist can make a big difference in how you handle your thoughts.

Please try to get a referral/appointment with a therapist who understands CBT as it relates to PCS.

My best to you.