Not likely, but...: Plan B and other emergency contraceptive pills work the majority of the time, but not all the time, so should test in 3 weeks. A urine pregnancy test done correctly gives a reliable result 3 weeks after sex (3 weeks after when conception might have happened). If done sooner, a positive result is likely real, but a negative result may be due to testing too soon, and therefore lead to a repeat test.
Answered 1/24/2019
225 views
5 doctors weighed in across 3 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question