Im trying to remember when I first started experiencing my problems
with TMJ to see if I can find a causal link of some kind....and this
is what I have come up with so far.

Scenario 1:
2.5 years ago I had a cavity in a back molar. It was drilled and
filled (composite).

I noticed my bite felt "weird" as if my back tooth was a little too
high. I stupidly ignored the problem.
1.5 years ago  I started getting a clicking sensation in my jaw...Also
i found that I would wake up with gum/tooth pain. 8 months ago my TMJ
problems really started up. Looking in the mirror I cant see anything
that would make me think that the tooth isn't level.

Scenario 2:

About 1 year ago near the same time my TMJ problems started, I was
prescribed Hydrocodone for some intense migraine headaches after
imitrex didn't work. I took it only about once a week for 3-4 months.
I noticed that I gnashed my teeth while on it, and also grinded my
teeth heavily a few times in my sleep. I discontinued it for these
reasons even though it did help with the headaches.

Scenario 3:
In the past 3 years I have had problems with anxiety culminating in a
a panic attack a year ago...during which my jaw was severely clenched.
It hurt for a few days afterwards.
I have since elminated the bulk of the anxiety through exercise and
relaxation techniques, as well as by working less.

Could any (or all) of these situations have somehow caused my current
TMJ problems?
Or maybe they just aggravated it?

I know correlation is the not the same as causation...but im curious
if this is all coincidental.

Opinions are welcome