Confusion with bleeding after d and c

I started bleeding exactly two weeks after my d and c (no bleeding after the procedure until this) so I assumed it was AF especially since I had cramps and bad headaches. Then two weeks after that I started bleeding again. Both times it was just a day of red blood (not a lot though) and then brown spotting for four days. Today I've been feeling crampy as if my period was going to start but no bleeding. So is this latest bleeding probably AF? Or is it possible that the cramps I'm feeling mean the real thing is coming? This is making ttc stressful...