I'm on the implanon and I have had it in for 3 years now. I get it taken out next month. My partner and I had sex one time this month a week before my period was due to come but it wasn't on my fertile or ovulation days. On the 22th of this month I was due for my period but I have not come on. I am 4 days late. Is there a possibility that I'm pregnant? Even though it's almost time for my implanon to come out is it still effective up to the month I got it put in?