Hi,
After going through your question I want to clear certain facts-
1) Blood sugar level of 150 1 hour after meal can be considered as normal.
2) Pain in stomach radiating to back may be due to pancreatic problem.
Hence I would like to advise you to consult your doctor.
There is a need for clinical examination depending on it there may be need for
ultrasound of abdomen and pelvis which help in evaluation of
pancreas and kidneys, blood investigations like
complete blood count, serum
amylase and lipase (pancreatic enzymes), liver and kidney function test or CT scan of abdomen.
With your mentioned blood sugar level you cannot be labeled as diabetic, I will advise you to do OGTT (oral
glucose tolerance test) to confirm your diabetic status.
Hope I have answered your query.
If so do vote the answer.