Yes there is, however it's extremely unlikely especially if you are breastfeeding.
If you aren't breastfeeding then you should probably take a pregnancy test in 2 or 3 weeks time if your period doesn't arrive.
even if you are breastfeeding you can still end up pregnant. breastfeeding is not full proof b/c.
you're going to have to wait until your period is due and take an hpt.