Jerry,
Are you testing your blood sugar levels after meals? I'm wondering if you're losing weight because your blood sugars might be running high much of the time and you may be producing ketones, which would cause the kind of weight loss you're talking about.
Try this: For a week or two, test your blood sugar two hours after a meal (start the timing from when you BEGIN the meal, not when you finish.) Also, buy a bottle of Ketostix (available at any drugstore) to test your urine for ketones. If your post-prandial numbers are running high (140 is the target for post-prandial, but between 140-160 probably isn't a problem) AND you are producing ketones (test for this when your blood sugar IS high), then that's why you're losing weight.
And I agree with Mark...it sounds like you may be a 1.5 (slow onset adult T1), especially as you weren't overweight even before diagnosis. Or you could even be a T1 who had a honeymoon phase (body still producing some insulin, but beta cells in process of dying off), and now you may need insulin.
I would ask your doctor to do two tests: The GAD antibody test, and also a C-peptide test. The results of those two tests will help determine if, in fact, you're a T1 or even a T 1.5.
Ruth