Implantation Bleeding?

Amy

So this cycle I did clomid and the trigger shot. I am suppose to test Monday and let me dr know the results. Last night I had some small sports of dark brown blood in my under wear. Today is has only been when I wipe there are small smears of the brown. Could this be implantation bleeding or should I just prepare for AF to come? My periods are very irregular because I have PCOS so I'm not sure if I would be getting it now anyway.