It looks to me reading http://dds.its.state.nc.us/faqs/default.asp that your emphasis on your doctor's not "backing you up" 3 years ago may be a good thing. As you say, they hardly knew you. But, you had to have the System's doctors do their thing instead since your doctors, according to the reference, "didn't exist." That's good. Now they do exist after 3 years. Your doctor wasn't being negative and unwilling in the sense you suppose; he was only saying he didn't know you well enough yet! If this March thing based on the System's doctors doesn't work, which it probably won't, by all means ask your doctor (and therapist) if he'll help now that he knows you better. It will be a new ballgame. Forget what he said before, that was based on his not knowing you and your case well enough yet and wasn't "personal" which I think is what you fear? They're not holding anything against you, aren't refusing to help "you" you were just right that the 1st or 2nd visit wasn't time yet. It sounds (to me) like you'd have an excellent chance if you don't get it this time and have to do an appeal.

I have a good friend who is quadraplegic, not much use of arms/hand and no use of legs; is in a wheelchair and has been for 25+ years (dove off a bridge when the tide was out, didn't realize it, as a 19 year old kid). He often has trouble reinstating his benefits after he's been laid off a job and he's a quadraplegic! :-) It's all part of a bureaucracy, try not to take it personally, just keep working at it like you would a medical claim with an insurance company.