Hi Brussel Sprout! Thanks for your reply. Yes I am so relieved metformin brought on AF. If I don't get pregnant on met, by July, we've decided to start taking clomid too.

I have indeed been following a low GI diet, and exercising, and I think both these things combined with the metformin has given me my miracle AF. However, last night I was very naughty and ate chips at the pub, so maybe this made me sick this morning? (Also had a glass of white wine and half a pot of beer... )

I saw the doctor today and she thinks maybe a cyst/follicle ruptured, which caused the abdominal pain, and she thinks that right at the time it ruptured, that might have been when I got the nausea, light-headedness and cold sweat. I feel better now, just a slight pain in my abdomen (it was never unbearable, just worrying). I'm right at the end of my period so was very confused as to why I was getting pain, and it didn't feel like period pain.

Also I rang my gyno but he wasn't in, so his receptionist said it's common for PCOS women to have some pain in the ovary areas when AF comes for the first few times. Not sure if she's right but hopefully all is good.