Hi ....i Last Got My Periods On 27 The May

Hi ....i last got my periods on 27 the May .....had sex with my boyfriend on 30th ...I took postinor as directed bfo 24 hrs ....after 3day i started bleeding ..it wasn't normal ,.it cld be dark and little wc lasted for a week .....now it's 1st June and I ve not seen my periods ...I'm scared to use a pregnancy test ....scared of what d results it will bring ....help