Implantation Bleeding or Menstrual Cycle?

Sorry, TMI but I can't tell if this is Implantation Bleeding or the start of my Cycle? I'm 19 DPO, CD34. I have irregular cycles and PCOS. I feel no symptoms of my period though. And my periods are always very heavy! Should I wait tomorrow to see if my cycle arrives before I take a pregnancy test? Have any ladies here experienced the same as me? Been TTC for 10 months now and I'm hoping to get pregnant! Maybe my period is starting soon?! Idk lol