I had sex on the last day of my period which was on the third of march 2017,I took postinor2 on the fifth of march,I had sex again on the eleventh of march,later in the night I saw my period again on the eleventh of march which I ended it on the 14th of march,I had sex on the 15,16th of march ,also on the 23,24 of march,nw on I saw my period on the 2nd of April nw,can I do a pregnancy test after my period to knw if am pregnant, or the bleeding I saw on the 11th of march is the because of the pstinor2 I used