Contraceptive push in - unportected sex 2 days after it be fitted but say linger 7 days, why?

I had the insert fitted in my arm Wednesday and today (friday) I enjoy had unprotected sex..I am on the the 12th time of my cycle - (implant fitted on the 10th day).
Why do they say dawdle 7 days after the implant is fitted formerly having unprotected sex?
What are the probability of getting progenat, the same as back or less expected? Should I take the morning after pill? It take 7 days for full contraceptive cover to develop after you have the entrench inserted. You are at risk of pregnancy having have unprotected sex and need to give attention to about getting some emergency contraception.
If it say aloud wait 7 consequently why wouldnt you just read it and embezzle note and NOT own unprotected sex?!