If you can make a list of all symptoms and how long they have been going on for you, it might make things cleared for the next doctors that you see.
A time line of sorts.
It is so easy to forget a few things or get distracted when in the drs office, that a list is often helpful.

I'm surprised that a few most tests or a MRI or something wasn't done... but if this wasn't a long time dr of yours then I can see why they might not follow up on a first visit.

If you have copies of any previous drs visits /notes documenting the ongoing symptoms that would speed things along as far as getting a diagnosis.
You have to fill out a form to request copies of drs notes. They have the forms at the front desk. Usually it takes a few days or week for them to get the copies made.