pregnancy symptoms PCOS

Mikaela
So last week I had a lot of CM and one time where is was slightly brownish. I was very moody and took a test and it was negative. I haven't had a period in a year but have been on Metformin about six months and started walking more and eating better. Now since then I have been having full headaches that I don't normally have. I don't know what it could be. I have no idea when or if I ovulated, when or if I would have a missed period, and when or if I would test again. I also read a lot of women not finding they were pregnant until they were further along and I'm scared of that happening to me.