Suggest Medication For Delay In Periods

hello dr.
i need very special help n its very urgent.on 10th of april,i had sex with my fiance and took an i-pill (contraceptive pill) . i had periods on the first week of april.now this month i m not getting period . i am having pain also......am i pregnant.kindly suggest as soon as possible i am very tensed .is there any abortion pill.kindly help me.i m from india.