A member asked:

I lost my virginity this month and i am super paranoid because my period is not here. we did have unprotected sex the first time but i made sure to get a plan b. i also took a pregnancy test and it was negative?

2 doctors weighed in across 2 answers
Dr. Theodore Davantzis answered

Specializes in Dentistry

Home pregnancy tests are accurate about a week after a missed period. Plan B is not 100% effective in preventing pregnancy.

Answered 6/2/2022

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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.

Answered 6/2/2022

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