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A 18-year-old female asked:

Unprotected sex on august 10. i took plan b after 4 hours. 6 days after i spooned/bleed for 5 days. my period came and it lasted 1day shorter. taken prego test, all negative. blood test came less than1. pelvic exam, everything good. % of being prego?

1 doctor answer1 doctor weighed in
Dr. Robert Kwok
Pediatrics 35 years experience
Pregnancy unlikely: Today's home pregnancy tests are very accurate and not affected by foods, herbs, common illnesses, sexually transmitted diseases, vaginal spotting, or medications. A test gives a reliable result 3 weeks after sex (3 weeks after possible conception) or 1 week after missing a period. If done sooner, a negative result may be due to testing too early, such as less than 2 weeks after conception.
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Related questions

A 23-year-old female asked:
Had sex after four days bleed for five days , blood and urine test done all negative , can the sex affect next month period not to come please so scared?
Dr. Gurmukh Singh
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 ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 23-year-old female asked:
Had sex four days after bleed for five days is it period or implantation bleed, when bleeding stop did urine and blood pregnancy test all negative , hope i am not pregnant , next period is few days to come i am scared?
Dr. Gurmukh Singh
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What you described is consistent with period bleeding. If you do not wish to be pregnant, use contraception all the time, every time. You may consider... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 23-year-old female asked:
Saw my period four days after sex for five days brown later turn red for two days later turn brown for another two day not is it period or implantation period, done blood and urine test after the bleeding stop it all negative hope am not pregnant?
Dr. Gurmukh Singh
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 ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 18-year-old female asked:
Unprotected sex week b4 period, pulled outplan b 12 hours later. 2-3 days after period supposed 2 start, brown/red blood. Prego or implantation bleedin?
Dr. Joshua Batt
Emergency Medicine 11 years experience
Not likely: This is likely normal menses. While it is still possible it is an early pregnancy, the only way to be certain is with testing. Consider being tested i... Read More
Created for people with ongoing healthcare needs but benefits everyone.
Last updated Oct 27, 2020

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