since takin metformin 12 days ago i have been getin headaches every now and again and im told its because metformin lowers the sugar in the blood makin u feel weaker and causin headaches, so im meant to be eatin something sweet like a diabetic would? cause im not sure how much is standard to eat to make the headache go, i want to lose weight not put it on eatin choc so wat is advisable?