I agree with Opus advice, a neuro can order a
scan of your spine and hips, to see if your pain is coming from the spine, or sciatica, or a hip problem. I myself have pain between my shoulder blades from a car wreck that broke my back in three places, so I wound up with some wild scoliosis, and my butt hurts too. But I do not have diabetes. So also, you could have one of four kinds of type II diabetic neuropathies, specifically proximal neuropathy.