I am 21 year old I had my last period on 25th of June nd on 4th of July I had normal sex then on 19th nd 20th I took a pill to delay my periods due to special occasion I had sex on 20th of July bt my bf says no sperm entered vagina its 23rd of July 3 days stop the pill bt still not having my periods what is the reason?is it due to pill or pregnancy? I took premount N as a delaying pill