Im 37 and have been trying to conceive for 2 years now with no luck. I was diagnosed last month with PCOS and started on glucophage. I know I ovulated this month - I am 5 days aways from AF. I have had extremely sore bbs which is very abnormal for me. Today I had a sudden about of nausea that had me running to the bathroom but I never vomitted. It was followedby a strange headache but everything subsided within 30 minutes. Then I was in the grocery and all of a sudden I thought I had wet my pants. TMI I know... it felt so thin that I didn't think it could be af. When I went to the bathroom it was very thin but also had a small amount of brown discharge. Solid brown not dark red or any pink, solid brown. Nothing appeared on the tp and I haven't had anything since and that was 2 hours ago. My question is does glucophage change the appearance of your periods or could this be implantation bleeding. I have two other children and never experienced implantation bleeding.