I found this, but I'd probably still call the doc.
Morning-after pills should be used only as a last resort (whether you are breastfeeding or not).
There are currently two types of products on the market packaged specifically as "morning-after pills:"
- a combination pill containing estrogen and progestin (Preven, Ovral)
- a progestin-only pill (Plan B).
Milk supply: Estrogen, in particular, has been linked to low milk supply in nursing moms. There may be a slight drop in milk supply a few days after taking the morning-after pill, but milk levels should rebound thereafter. See Increasing Low Milk Supply
for additional info on increasing milk supply. Talk to your health care provider and/or lactation consultant about using an herb that increases milk supply
(fenugreek, for example) to reduce any adverse effects on supply.
Safety: The morning after pill is considered compatible with breastfeeding, but should only be used rarely. Not the first choice for routine birth control, it should be used only as a last resort (whether breastfeeding or not). Both progestin and estrogen are considered compatible with breastfeeding by the AAP. See below for additional information on side effects related to lactation