Friend took plan b 36 hours after sex. 7 days later positive test. 2 days late a negative test, two weeks later another negative test, 3 days later another negative. she's had cramps for 13 days now.. ps. a week before her period she bled 3 days?

She should get a blood test for HCG level to settle the issue. She may need to repeat the test at more than 3 weeks after sex, unless she gets a period by then. It takes about 3 weeks from the time of sex to get a positive pregnancy test. Get HPV, Flu and Covid vaccines. Wish you good health! Safe sex: https://www.hopkinsmedicine.org/health/wellness-and-prevention/safer-sex-guidelines