Hello, I would be happy to help you with your question.
Based on when you had intercourse (day #5) and proper use of emergency contraception
, the chance of pregnancy
from THAT encounter is extremely low. Given that you are late with your period might be related to the use of the emergency contraceptive pill
itself, which, in many cases, delays ovulation and this will in many cases lead to a delay in your period.
Given the confusion with your cycle, you are still at risk for pregnancy and should be using backup protection unless you are trying to get pregnant.
I hope this helps. Please use the Premium service if you require more detail.