I thought I was having a period after Josie because I bled like that, but actually my midwives told me that it could just be the lochia from birth. I bled every 2-3 weeks until June and then it stopped altogether until September when I believe I actually got my period back, because then I had a month long period in Oct.
Sometimes afterbirth bleeidng comes and goes for a while and isn't always the 6 week downpour people talk about.
Honestly- I wouldn't be too worried, if you are that is. I mean if you want another so soon that's great, but if not I'd just let yourself believe it's probably just left over birth bleeding.