I dunno, sorry Fiona. My AF returned at 3 months. I bled for about 6 weeks, it stopped for a bit, came back a bit... I mentioned it to my OB when I went for my checkup (which was heaps late coz I couldn't get an appointment!) and he said it's very common to have a light bleed even after your lochia has stopped.

If you're not sure if its AF or not.. I'd be careful with contraception just in case! hehe.