Hi I had a sex with my b.f on April 4th ,5th and 6th but we did use prevention and I got my periods in the month of April (April'25), but now I have not got my periods, I am scared that is it related to pregnancy or what but I did a pregnancy test through prega news but it showed a negative result, now on 30th May I have taken 1 tablet of meprate ,,please suggest what should I do ????