A member asked:

23 yo and took plan b last week , never have had cramps on my period. now intense abdominal and back pain when on period, late onset or side effect?

9 doctors weighed in across 2 answers

May be normal: Your bleeding and abdominal pain may be normal. I would suggest taking a pregnancy test as well. If discomfort or bleeding are very significant please contact your doctor.

Answered 5/26/2016

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Dr. Heidi Fowler answered

Specializes in Psychiatry

This can happen w : Plan b. Potential side effects w emergency contraception include: tender breasts; changes in menstrual flow (spotting, bleeding, early or late period); loose stools; dizziness; headache; nausea/ vomiting; abdominal discomfort / cramping or feeling tired. If you develop chest tightness, difficulty breathing, swelling of lips, mouth, throat – call 911. Take a pregnancy test & notify doctor if your.

Answered 3/22/2020

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