No need to take more pills. It will work. It acts by making your vaginal lining hostile environment for the spearm. So it does not matter if you u have sex before or after that. But if you have sex again within 24 hours without protection then you need to take the pill again. After 2 weeks get a Urine
pregnancy test done via kits available in the market.
Next Steps
take pill again only if you had unprotected sex after 24 hours
Health Tips
best thing is to use condoms