Hi Doc.I am 45 years old.I had unprotected sex,24 hrs after my period ended.I took the first tablet of Postinor 2,about 4 hours later,and the second tablet,about 12 hrs later.The next day,24hrs later,i had another round of unprotected sex.Can I take another dosage of Postinor 2 tablets,to prevent pregnancy,or am i safe,as i just finished my period,prior to the sexual acts.