Brown spotting

Faye

So ladies, I have had two periods since giving birth. There was 41 days between the two and now I'm on CD 31 awaiting my period again. I've been having scant light brown spotting for the last two days but nothing more. My period before giving birth was always a 30 day cycle. My partner and I had sex on CD 12, 13 and 18 using the pullout method this month. I guess I'm just worried that spotting is implantation bleeding. I really hope it isn't. Could the spotting just be my body trying to return back to normal?