hi i had sex last month just 4 days after my period,i used norvelo morning after pill but it works within 72hours,by that time i was already late so im not sure if i will work,im not about to see my periods anytime soon but lately i have been feeling pains on my lower abdomen and my breasts are sometimes itchy it has been going on for a couple of days,does ths mean the pill didnt work or i might be pregnant