Welcome to NT...it's always helped me get info, support and laughs too...
Whether or not your symptoms diminish will not deter the doctor from investigating. Make sure you write down your symptoms (a symptom journal) with possible date of onset and diminishment. Also write down any questions you might have for the doctor-once you're in the office they might disappear.
If you can bring someone with you, do it...it helps to have a second set of ears.
I worry about your vision problems...try to be careful, especially with vertigo. I know how suddenly it can crop up.
And if you don't get a definite diagnosis immediately, don't give up...it took most of us years to finally get a diagnosis. Your symptoms could also be from other disorders.
Keep us posted on what's going on, and let us know what the doctor says...we're all "experts" at this process, and can give you advice and hugs...