Thanks folks for the help. Let me clear up a couple things.
The deafness in my left ear happened 35 years ago when I was a small child. It came as the result of a string of illness including an ear infection, chicken pox, and pneumonia, with a very high fever, all in a period of 2-3 weeks. The worst part, which probably caused the nerve deafness was a severe allergic reaction to erythromycin, given to treat the infections. At some point during or right after that illness I had complete deafness in that ear. So, what I am experiencing now, to the best of my understanding is in no way related.
The present hearing loss/difficulty/discomfort is as I described:
I have had these symptoms about 5-6 times in the last 2 years.
They last from 1 to 4 weeks.
The most severe bouts seem to be accompanied by neck stiffness and headaches.
They may be related to stressful times/events.
I addition, to loss, I would have to say that the more annoying aspect is that it is generally just muffled. It feels exactly like it does when you have your ears plugged when descending in an aircraft. I am quite sure it is not a Eustachian tube issue, as I am easily able to equalize the pressure in my ear with the valsalva maneuver.
Additionally, when I am exposed to low frequency sounds, it feels like it is resounding through my head. I am hyper sensitive to low noises, such as thunder a long way off, or music playing, machinery, and etc., it is almost like distortion in a blown speaker.
It is not progressive. It will (hopefully) be completely fine in a few days, and then show up again unannounced in a few months. this is the present cycle.
About the MRI and neurologist. I was in Jakarta about three months ago, so I decided to get an MRI. I went to the hospital here and asked to see a neurologist. After explaining my symptoms, he agreed we should check it out. I didn't want to disagree with him about the contrast, because I was just glad I was talking to someone who knew what AN was. So I waited 4 hours and got the MRI (no contrast) and the radiologist said they found nothing. By that time, the DR had left for the day, so I never talked with him again. I don't know what to do now. I am concerned because now the symptoms came back again and they are impossible to ignore.
Thanks, I am very eager to hear from all of you about the intermittent question, and whether you recommend I do the MRI again with contrast.
Here in Indonesia you kind of have to find your own way, so I value this forum greatly.
Brian