I agree with you Mark, both about anxiety control
Being key for an RN as well as anxiety being a major cause of brain fog.

It's just difficult deciphering whether it's from anxiety or the actual concussion. I have to become keen on identifying the difference as I don't want anxiety related fog to hold me back from activities I enjoy.

I guess I have to work on taking a step back from it all, be in the moment more, maybe that will help me be more clear on whether it is anxiety related or not.

I don't think you can adequately determine what is anxiety related and what is concussion. In my experience, the concussion fog will go away after a short rest. Properly done, that rest can also help reduce anxiety. You will need to learn to moderate stress that causes anxiety, your thought based anxieties, and how to take short effective breaks.