The regulator was my own. It was brand new. So, I will definitely have it checked. The more I consider the situation and read these posts I've developed several conclusions.
I did some reading on narcosis. I would have to say I definitely exhibited several of the symptoms during and after the event.
In evaluating the dive itself, I'm very bothered by the fact that we were that deep. In hindsight, had we been briefed on exactly how deep this particular dive was going to be I'm fairly certain that we would have waved this one off. In the future, I think I will ask more questions pre-dive of the DM so as to better understand the profile that is planned. Ultimately, this is my fault.
When reflecting on the 4-5 wall dives done after this event, I'm able to rethink several situations. First, I was not necessarily bothered by the wall. I think what bothered me is the feeling the bad experience left me with. Second, free descents were not troubling until after the event. My conclusion is that the free descent may well have been a reminder of the feelings as well.
We had been exposed to several swimthroughs prior to this dive. They were no trouble at all. I think the issue with swimthroughs may have occured after the fact. Again, it was a reminder of the anxiety experience.
Is there a particular site I could look up the varying degrees of dificulty regarding various dive sites? I hear some dives described as beginner divers. I hear others described as intermediate and advanced. I would be curious to know what my dive would be classified. The shear depth alone was probably beyond a "beginner" label. I find that having been asked to complete such a dive with only 10 or so logged dives under my belt bothers me. It just reitterates the fact that you cannot put your personal safety in the hands of a DM.
This discussion has been really enlightening. It has caused me to rethink and reevaluate several things. Thanks to each of you for your contributions to the discussion.