I have type 2 diabetes and taking 1gm Metformin tablets twice a day. My blood glucose readings are changed since last week. after 2 hours of dinner my reading is around 15 and then I go for one hour walk jog combination which drops my reading between 7 -8. then I sleep. after 7-8 hours of sleep my fasting reading is between 9-10. then after 2 hours breakfast my reading is between 7-8. but since last night there is huge difference. my reading after 2 hours of dinner was 12.8 and then after 2 hours it came down to 8.2, then after sleeping for 7 hours fasting when I checked this morning reading was 14.4 and after 2 hours of breakfast it is 24.6. nothing changed in my diet, i did not eat anything extraordinary, had same meals which I have everyday and taking my regular medication. wondering whats wrong. my GP is away and will be back next week and I really do not want to different doctor as my current GP to whom I am seeing for years is very good and knows my history etc;