Hi,
First of all let me make it clear that
pregnancy testing after 2 days of sex do not have any reliability about results. As the test depends on hormone
hCG, which can be detected by home pregnancy test not earlier than 8 days of delayed periods. So test positive after 2 days of sex is either contaminated urine sample or the container.
Similarly pregnancy symptoms appear after 2-3 weeks of conception. So, headache,
vomiting fever are more likely to be due to some infection (bacterial/viral) or psychological
stress & fear of being pregnant. Unwanted 72 has to be taken within 72 hours of sex (to prevent pregnancy) earlier the pills are taken better are the effects.
There is no point in taking the pills after 72 hours of sex. Get her treated for fever if it is continuing. Wait patiently & in case she gets her period delayed,get her pregnancy test done & medical termination of pregnancy if you really don't want an issue.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. Vasudha Jayant Athavale, General & Family Physician