I have been on metformin for one week but been low cal diet for 3 weeks. My numbers today was 5.3 fasting which went up to 6.3 two hours after breakfast. Two hours After lunch was 7.2 by these numbers I feel I am doing very well Problem is I feel rubbish. I feel very strange and my head feels so fuzzy. I am short breath and have a dull headache. Is it the drop in numbers. Any thoughts be appreciated