South Africa
A 32-year-old female asked:
16/02 unprotected sex (during fertile window) 17/02 took plan b.. 01/03 light bleeding.. can it be menses or withdrawal bleeding? i also had tender breasts since last week but today they are no longer sore? also had a negative urine test?
2 doctor answers • 2 doctors weighed in

Dr. Yvette Kratzberganswered
Pediatrics 26 years experience
Plan B, sometimes referred to as the “morning after pill,” is emergency contraception you take within 72 hours after unprotected sex. It contains a high level of hormones that interfere with ovulation/implantation of fertilized embryo. It should not be used regularly as the levonorgestrel can have side effects including nausea, abdominal pain, fatigue, headache, irregular bleeding, breast pain.
Created for people with ongoing healthcare needs but benefits everyone.
Reviewed Mar 12, 2022

Dr. Gurmukh Singhanswered
Pathology 51 years experience
Conception occurs within day or so of the sex. It takes about 3 weeks for the embryo to make enough HCG for a positive pregnancy test. Blood test may be done a day after a missed period. Home pregnancy tests should be done 4-5 days after the missed period. If the result is negative repeat the test in 4-5 days. Use first morning urine and follow instructions for the test carefully.
Created for people with ongoing healthcare needs but benefits everyone.
Answered Mar 12, 2022
Last updated Mar 12, 2022
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