I didn't read all the responses but wanted to tell my story. I have lost close to 60 pounds so far. I exercise strenously 4 - 5 days a week. I take 1500 mg. of Glucophage (metformin) daily. When I follow LC EXACTLY, my cycle is practically to the day! If I go off LC right before my period, it is about a week late.

How long have you been on Met? Maybe it's time to up the dosage?