I recently had my Metformin increased from 500 mg/once daily to twice daily. I'm light-headed, nauseous, dizzy, very tired, bloated, have abdominal cramping and diarrhea. I don't have diabetes, but I do have PCOS which makes me prone to metabolic syndrome. I've been on Metformin for many years once daily. Do these side effects go away with time? and how long?