I was intimate with my boyfriend on 29th december 2018. And I took unwanted 72 at the same day. My period was start on 8th january 2019. But this is irregular. And stayed for 2 days.in the month of february and march I missed my period. But I was check my pregnancy with pregnancy kit for two time. The result was negative. I wanted to know am I pregnant or what is the problem with my periods?