I have PCOS. On October 17th, my doctor started me on Metformin to try to make me ovulate on my own. (If I don't then he'll add Clomid the end of January). He told me to wait a couple weeks and I didn't get my period, take progesterone to give me my period. On November 10th I started the progesterone and got my period on November 18th until November 22nd. Then on Monday, December 3rd I had really light (no tampon or liner needed) pink, sometimes brown, spotting/bleeding. This lasted until the afternoon of Wednesday, December 5th. It just stopped as fast as it started. Since I don't know if I ovulated, or when my next period would come, I don't know what to think of this. Could this be implantation bleeding? Or could it just be a period, but wasn't heavy at all since my period started just 16 days earlier? I took a pregnancy test Sunday, December 9th, and it was negative. I am not sure if that was too early to test. If it was not implantation, then i am hoping that it was my period trying to come on, which means there was a good chance i ovulated on my own with the Metformin. Any feedback is greatly appreciated.