Hello doctor, I had unprotected sex on 16th December but he didn't ejaculated inside me although I took ipill on the same day within few hours and I got my withdrawal bleeding on 22nd December which was more like my periods full fledged periods that continued for three to four days. But I've not got my periods after that,  that means I skipped my periods in Jan. Also I had protected sex on 25th jan and now its Feb, I still haven't got my periods after that withdrawal bleeding I took upt yesterday that m evening that means on 6th Feb which was negative, can I be pregnant what should I do? when can I expect my periods.