Can Althea Pills Work As Emergency Contraception, And How Should I Take Them To Prevent Pregnancy?

Hi I just had a sex with my boyfriend unprotected, i stop taking althea pills last march. Is althea is an emergency contraceptive that i can you right now to prevent from getting pregnant? How many doses will i take ? I dont want to get pregnant, im from the philippines by the way. And i dont know what to do? If there is an emergency contraceptive here in the philippines. Pls help me