Be forewarned, if your doctor knows you've been doing lots of research trying to come up with your own information - it may change his attitude towards you and your problem. That's not to say that you shouldn't be an informed patient...but there's a difference between being an educated person - and being someone who is simply looking for potential health problems in themselves. We've all had this discussion before - and those types of people are out there. Your doctor probably sees people regularly that come in thinking they've got all sorts of bizarre ailments...when there may or may not be nothing physically wrong with them.
The last thing you want is to have your doctor lump you into that classification and not take you seriously...he may tell you to go home and read your 'It's all in your head' pain book.
I don't know you or your doctor..but you may make gains if you walk (or hobble) in there with a list of your symptoms, the significant impact on your life - and your desperation for answers. State that because whatever is happening appears to be nerve related, you feel a referral to neuro is in order. Then you may want to add that 'in the mean time, there's a number of other tests that I understand should be done...B12, diabetes, Lupus...' You may want to imply that this was suggested to you by a medical person. You don't have to say who - and it shouldn't matter since those are standard logical tests (according the medical doctors of practically everyone here).
On the other hand, if you tell him you've been frequenting an internet bulletin board, and your non medical, feet friends there say you need this and that - you're likely to find that he's not terribly receptive to what you have to say. Some doctors may be interested, but I'd be willing to bet that most won't be impressed in the least.
A little of topic, but this goes back to the recent discussion between Robin/Gordon/yourself/etc on self diagnosis. The internet has created a huge problem for the medical profession in this sense - because there are thousands of people surfing around with access to medical information that has only been available to doctors before. While it may be a good thing to have information about a condition you have, it can be misleading if you're trying to diagnose yourself. Read symptoms on pretty much any ailment - and you'll likely find at least one or two that you have....(just because I have a fever...does not mean I have the Bubonic plague, although that may be one of it's symptoms). Like em or not, doctors and specialists are still the only folks around with all the info needed to help figure out what's wrong with you.
Good luck Alan, let us know how it goes...I'll be thinking about you...I go for my acupuncture assessment early Monday morning....and if those needles hurt a lot I'll be remembering that you told me it was no big deal!!!!! :)