Did your period come before last month, or was that the first one?
Do you wish to become pregnant? Thank you.
Bleeding around the time of a period is not usually a sign of pregnancy. It's more often due to some hormonal changes, which are not unusual 10 months after having a baby.
I would do a pregnancy test. If it's negative, and your period was due, then it's highly unlikely that you're pregnant.
Then I would just give it some time to see what happens with your periods.
I don't think that you're pregnant. If you don't wish to be, I'd suggest using something for birth control. Best wishes.