I posted on your other thread but didn't make the connection. Again, the fact that you are losing weight is awesome. But if you have type 2 diabetes - you have to be very vigilant about maintaining your blood sugar. There is no way you can maintain a stable, steady blood sugar all day if your eating such low calories. There are numerous studies online reporting the benefits of calorie restriction at slowing diabetes - the one I looked at mentioned ~1800 calories/day and being extremely sure that all required nutrients were being obtained. I would be very skeptical of a doctor that recommends eating only 1000 calories or less per day... at the very least I would seek a second opinion.
I checked my BMR on an online calculator and I need over 2000 calories per day to maintain my weight - I'm 200 Lbs, 5'9, and 22 years old (female). Since you're heavier and male you probably need way more than that. Cutting 500 calories per day and exercising daily should be enough to lose weight.
I don't have diabetes so I don't know what is right for you - but not all doctors are good. I would get a second opinion!
Also, while sugar-free things don't have calories - they can actually make you feel hungrier.