Hi welcome to Health care magic forum.
Thanks for choosing H.C.M.Forum.
You have got sudden pain full cramp, in the left side of your neck, face,
and head. You fear that you may fall down. It lasts for only few seconds, and after relief you feel numbness
of the face for a long time. You are 50+, and diabetic, using insulin
Most probably it is either hyper glycemia, (more sugar,) or hypoglycemia
.(less sugar than the normal) other causes are cervical spondylosis
, probably in the begening.
I advise you to consult a physician for diagnosis and treatment. You may need to have a C.T.scan of the neck besides other routine tests for confirmation.
Wishing for a quick and complete recovery.