Cramping? pregnant?

i had unprotected on march 5-withdrawal method... my last period started on february 22 and ended the 26 and ive been bloated, having minor hot flashes and chills, slight cramps in my abdomen, but they don't feel like the cramps i get before a period, more like short twinges than cramps... slightly nauseas but im not sensetive to smells or anything... when should i take a pregnancy test?