Bek - In your situation I'd play it safe, unless of course you'd welcome another pregnancy. I had no signs my cycle had returned when I fell prg with D, was still feeding L etc. I had a few days of light bleeding which I thought was AF returning but who knows. It could have been implantation or even just prg spotting which I get with all my pregnancies, we have no idea of dates in any event and just went with dating scans (which could have been off given he was such a big baby and by those dates over two weeks late)

Anyway, what I'm trying to say but just rambling on is, I'd be taking precautions if you want to avoid another pregnancy.