Period after D&C

Salina
I had a D&C a few weeks ago (not due to miscarriage) and was told to expect lighter periods for a couple months. I usually have extremely heavy periods so I'm just curious as to what to expect? The past couple days I've had really really faint brown spotting (only a tiny bit when I wipe). AF is due tomorrow and I'm just not sure if this could be the start of my period?