i have been put on metformin 2*500mg tablets,ever since i have been on these tabletsi get terrible pain in my back,pain in my chest and in my joints on my arms,i contacted my doctor and he took me off the tablets for a week,the pains i were getting got quite a bit better id say around 75% he also told me that my blood sugar levels would rise whilst i was not taking my tablets fair enough i thought,to mine and my nurses amazement my blood sugars went down 10.9 on tablets 4.8-7 without,,my doctor told me to start taking the tablets again to see if the pains i was getting come bacl,low and behold they did and my bs went up again,on my last visit to the nurse i showed her my dairy and she advised me to stop taking the tablets was she right to tell me this?she said that the tablets were creating lactic acid which was proberly be the cause of my pain,so i stopped the tablets again my bs went down to 4.7 am after breakfast and 6-8 after my evening meal so i am now totally confused.what do you think i should do next