I was diagnosed with PCOS at 16, I have always had irregular periods anywhere from 3-10 months apart. I had been on birth control from 16-23. I am now 26 years old, married and have been trying to conceive for about 2 years. About a year ago we starting seeing my gyno to figure out what we could do so I could conceive. Over a few visits I had a few sonograms checking my ovaries and was told I didn't have PCOS. I was put on a diet as I am over weight, 167 lbs at 5'2". I started seeing a different doctor this month who had a HOMA index done and diagnosed me with pre-diabetes. This doctor has put my on metformin 500mg 2x daily it has been 4 days now. I have been getting diarrhea and slight dizziness throughout the day, I'm hoping it goes away soon. Can anyone tell me how long it took to get your period after starting the metformin? Also, how long after did you conceive?