As your GP is continuing to treat you as T2 but has booked an appointment with a consultant, all you can do is hang on in there and continue doing what you have been doing (low carb) and wait. One thing though, if you obtain a print out of the results or have on-line access to test results, it may give the correct reference ranges. They usually do. Insulin should read at the lower end on a fasting test - that is desirable for a T2. What you don't want is high insulin, which sadly is the cause of insulin resistance and in the end, diabetes T2. I know nothing about c-peptide, but if those reference ranges
@andcol gave are correct, then all seems well, at least for now. Did you also have a GAD antibodies test?