Re: postpartum pregnancy???
If I understand right, it can take a while for a woman to get her period again, or at least for it to become regular again, after giving birth. I know a few girls who didn't get a period until 6+ months after having a baby. So I'd say that's most likely what's going on in your case. BUT, there is probably definitely (that doesn't really make sense lol) a chance you could be pregnant, too, if you're one of the people whose periods get right back on track right away. A girl I work with just had her baby in June, and she had a period exactly when she normally would have - 4 weeks after. So it all depends, but it could be possible.
It sounds like it wouldn't be too early for you to take a test, since you've "missed" a period. Couldn't hurt to take one!