I'm not sure what's going on

So I have PCOS which causes me to go months with out a period. I recently went to a new obgyn and she told me I need to be having one at least every 3 months. So she put me on Provera for 10 days. I took a pregnancy test before starting the Provera per my doctor's orders and it was negative. I took my last pill this morning and not long after I started spotting. The thing is O know that false negatives happen especially with women who have PCOS. What I'm worried about now is am I miscarrying? Is it just a period? Am I over thinking everything?