I think plan B failed.

Patient : I had unprotected sex a few days ago. The same day I took plan B. Now, about 5 days later, I still haven't started my period so I took a home pregnancy test, it said positive. Am I pregnant?? What are some reasons this could happen if not? Please help!
Symptoms:  Positive home pregnancy test, extremely moody
Doctor :   Hi, Thanks for the query. I understand your concern. Usually, emergency contraceptive pill can give approximately 9 0% protection if taken within 24 hours of intercourse. After taking emergency pill, you can get withdrawal bleeding in one week to ten days. But as your urine pregnancy test gave a positive result, there is some possibility of failure of emergency contraception. To be sure, you can go for a blood test for pregnancy or ultrasound which can give more accurate results compared with the urine test. Take care.

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