I had pain in my lower stomach week after unprotected consumption

I had sex with my boyfriend and he ejaculated outside but was not sure,he told me to take i pill i took dat.And ine more imp. Thing i had sex with him 3-4 to days before date of my periods ,i had taken the piill on about 67-72 hour after our sex.Now i am not having my periods and it is about 5-6 days had gone Plzzz any1 tell me war shuld i do, vry tnsd .i also had pain in my lower stomach yesterday but it's okay plz any1 tel me any solution