Hello Doctor. Im On My 8th Day Of Menstrual Cycle

Hello doctor. Im on my 8th day of menstrual cycle and i just had unprotected sex. Im planning to take morning after pill. But on the other hand im going abroad for some reason on 13th of april and i will be taking norethistrone for delaying of my periods. I want to ask that whether these two drugs can be taken as described above?
Also tell me when to start norethistrone. Thankyou.