Hi,
@spanishc103,
I can definitely relate to your frustration, as I have pulsatile tinnitus, too. I've had it for almost six years now, and have had a number of tests with no cause identified. I don't have hyperacusis, but I do have a high-pitched hissing tinnitus along with the pulsating.
Do you have some hearing loss in the ear (or ears) along with the pulsating and hyperacusis? Did you have hearing loss before this began? And --- did both conditions start suddenly, at about the same time?
In my case, I had tinnitus and mild hearing loss in my right ear before the pulsating started. Mine was set off by taking a blood pressure drug for the first time. Are you taking any medications that could have affected your ears?
Here is a link to some information about the most common types of pulsatile tinnitus:
http://www.dizziness-and-balance.com/disorders/hearing/tinnitus/pulsatile.html
You could read through these, and do some research on some of the symptoms, to see if any might apply to you. Then, you could consider seeing a neurologist, or having a radiologist take a second look at your scans.
Also, you could check out Whooshers.com, to read over some of the possible causes and success stories there for people who have had pulsatile tinnitus.
I hope this information is helpful to you, and that you are able to identify a cause for your condition.
Best wishes and hugs,
Karen