Okay, first I guess I should give all the relevant information.

I am 29, and have been diagnosed with ADD since I was about 7. When I was 3 months old I had a head injury (hit in the right side of my head 3 times by a ceiling fan on high). I have always had problems with social anxiety, which I have managed to somewhat cope with after nearly 30 years of trying.

I have always had a high IQ, (169 several years ago) and have always been able to learn just about anything much faster than anyone I know, much faster than average.

Over the last several years I have noticed a steady decline in my ability to understand things, study, remember things, and communicate with people. I have been having symptoms that look disturbingly like... central auditory processing disorder, temporal lobe epilepsy, and maybe even early onset dementia. I do the research, and I am by no means a hypochondriac, but I just can't figure it out.

Any background noise prevents me from understanding the speech of others, sometimes rendering their words into garbled nonsense. I am able to deal with major upsets in my life with little problem, but small annoyances set my brain on fire (irritation, anxiety, anger, over-reaction). I find it exceedingly and increasingly harder to pay attention to things, even if I have a high level of interest in them, almost like the harder I try the more my brain actively fights against any form of focus or retention. I can remember almost every word of every conversation I have ever had, but major things that are happening now, like where did I put something, did I do that thing yet, or have I eaten yet, are disappearing faster and faster.

I feel like I am losing everything that I have to define myself and I don't know what to do.

I plan on going to a neurologist as soon as I have the insurance and the time, but I was just wondering if anyone had any idea what this could be.