Dear jo i can understand your concern
i am very sorry for your condition.
blood sugar in the range of 400 mg/dl is Diabetic range of blood sugar.
usually this range of blood sugar needs the usage of
insulin for a short period in case of type 2 diabetes.
since i don't know the details of your age height and weight i can not comment on your type of diabetes.
in my opinion taking insulin is good idea in this kind of conditions
its also advisable to follow good diet and exercise pattern for effective lowering of blood sugar.
type 1 diabetes most seen in very young kids
type 2 diabetes is mostly seen in middle age individuals and incidence will increase after 35 yrs of age.
i suggest you to discuss with your doc regarding the diagnosis.
relax
Hope I was able to help you.
If you have any further question feel free to write me back. I will be happy to help.
Take care.
Best Regards.
Dr Vamsi Krishna
Consultant Diabetologist
Apollo Hospitals