hello,
Good Evening
due to 
diabetes you have 
severe pain in your body
kindly check your diabetic level,its control or uncontrolled. if uncontrolled
that's the first reason of body pain
secondly.check your blood pressure level
in diabetic patients mostly complains muscular weekness and joint pain due to diet control 
as a result they find 
vitamin deficiency due to vitamin deficiency in whole body 
metabolism process does not work as a result you feel weekness,and severe body pain,
Diabetic Neuropathy is the common common complicated disease in diabetes
I can advise you 
take healthy diet wich contains proteins
take 2 fry eggs in breakfast
if you have blood pressure problem remove yolk and avoid salt.just only take whites
take fruits with low sugar,such as an apple,etc
take vitamin D supplements
I can suggest you in vitamin 
Centrum silver vitamin 
Vitamin D3 omega fish3 oil
pain killer you can take Piroxicam
   At the end I advise you check your blood analysis
for
         Blood urea
         creatnine
         RA. Factor
         ANA
         Uric acid level
       Thanks
  if you find any question don't be hesitate to ask me
              Regards,
                               Dr,Naeem.  MD