Well, I thought it was just anxiety that caused this, but my anxiety is gone and I still experience this.

I have been struggling with derealization/depersonalization ever since my minor head injury. This was my first concussion, and I had no unconsciousness or nausea. It's been almost exactly two months.

I've had numerous tests, and my memory checks out fine...however, something isn't quite right. It's hard to explain, but I'll suddenly dissociate, and then it feels like everything that has happened earlier in the day before the dissociation was longer ago, almost as if I had slept and woken up. These sensations are quite terrifying.

Anybody else experiencing this? Any advice or knowledge on the subject?