It could be tmj, but you mentioned that you suffer from anxiety.  In my own personal experience, my anxiety results in tmj and related symptoms, actually, the ones you describe.  When I am anxiety-free there are absolutely no symptoms.  It's something about anxiety giving muscles a life of their own causing them to tense, sometimes with resulting pain and other symptoms.  Other common muscles affected are the shoulder and back muscles.

The symptoms you describe below all result from anxiety.  They could be caused by tmj, but then again, you said the magic phrase, you suffer from anxiety.  So going from my own experience I will say that these are very well anxiety related:

i sufffer from the inability to 'pop' my ears(constant, can not equalise the pressure), head aches/pressure, bruxism and a tense jaw

i also find it difficult to concentrate and get visual disturbances. (hard to describe - blotchy, 'shadowy' vision & pretty bad light sensitivity.

The thing is, if you mention this to a doctor or other professional, they will probably look at you as though you have two heads.  Because they have not experienced it.

My question is what are you doing to treat your anxiety, are you taking meds or natural alternatives?  And how severe is your condition.  From what you describe, it sounds as though you are suffering severe anxiety.  Are you able to do normal day-to-day activities comfortably?

Anyway, below is a link to an article that I wrote on the subject.  The article is from personal experience, as when I write about this subject, my main goal is to make people understand what anxiety really is.

http://www.tbyil.com/Anxiety_Panic_Disorders.htm

My Best,

Luella