Hi,
Based on the history you have shared, first of all, if she is a feeding mother, that acts like natural
contraception and doesn't need pills for that.
Secondly, feeding is a complex
hormonal process and any alterations with hormonal axis can cause disturbance as with emergency pill which contains hormones and can disturb the normal feedback mechanism.
The baby may not be having issues due to these as it doesn't secrete in breast milk and might be having a separate issue triggered by infection etc. and need
pediatrician review for examination and workup accordingly.
Also may need oral rehydration salts to avoid water and salts loss and antiemetic as well as antipyretics, for symptomatic relief.
Hope I have answered your query. Let me know if I can assist you further.
Take care
Regards,
Dr Saddiq Ulabidin, General & Family Physician