I don’t know what it is

So not to be too much tmi but I’m normally a very very heavy bleeder. And I started 3 days ago. But this time it’s weird. I’m barely bleeding at all. I kinda just thought when i first started that it was just because I was fixing to fully start. But since those 3 days I have barely bled enough to even be able to say that I’m bleeding. I don’t understand what it is or what’s going on. I’ve called my doctor. They said they can’t get me in for 2 weeks. Does anyone know why this could be happening? And yes I do have PCOS.