what could this be????

Amber

I am ttc with #3. I also.have pcos. irregular periods. been ok on metformin 500mg a day. currently (according to.cycle from.last month) I'm 9 days late for af. 2 days ago I wiped and got egg white cm that had a tiny bit of blood on it. only happened once. then the same thing happened yest-only once as well. and now nothing. does anyone know what this could be?? I'm so confused