I have pcos and my doctor put me on Metformin before to help conceive my oldest child but never did it mess with my period or anything, but didn't need it for my daughter or our youngest. But we are trying again and the doctor put me back on Metformin as we are having trouble conceiving again. Been a month on it and they put me on B12 as well but my period was due and all I got was light spotting for two days and then nothing, was bright red, and my periods are usually 4-5 days long and start light get heavier then goes light. I also don't get cramps during or after, I only get cramps one weeks before hand and didn't have them till now and very light and slight pain in that area. I mean I know everyone is different but I am wondering if this has happened to anyone else before? I also have some nausea in the morning and at night. I know I can test but I'm so afraid to get my hopes up and then find out something else is wrong or I'm just not pregnant. Please need advice.