If you are breastfeeding 100% of the time and your period has not yet returned, then you may not need emergency contraception.
Plan B® can be used safely during breastfeeding with no changes to your breastfeeding schedule. Ella® can also be used safely during breastfeeding. The CDC recommends that women delay breastfeeding for 24 hours after taking ella® as some of this medication is excreted in the breastmilk. The strongest concentration of ella® in the breastmilk occurs for 1 to 3 hours after taking it, so some providers recommend pumping and dumping only once. There are no known complications for babies who do breastfeed right after the mother has taken emergency contraception.