Thank you for your medical query at AskTheDoctor.com
I understand your concern.
The symptoms she is having is due to the Plan B. After the consumption of plan b, some women experience dizziness, headaches, and cramping and minor spotting. This is also known as the withdrawal bleed and is due to the sudden change in the hormonal levels due to the Plan B.
Please do not worry about pregnancy.
Hope this was helpful,
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