I have been a type I diabetic for about 15 years but recently have become a type 2. My doctor started me on insulin (10 units each night) to bring my blood sugars down to a reasonable amount (6). When I wasn't able to get the blood sugar below 18 I started to take 30 units and now I am experiencing a strange sensation in my neck and heart area (like dull flutters) that is why I am researching this online. My doctor hasn't been able to answer my quastions about whether I am experiencing a reaction to the insulin or whether I am insulin resistant and this could be a problem like Metabolic X Syndrome.