Can you get pregnant on implanon????

I've been on implanon since feb 5th or 6th of this year.
I had unprotected sex and we both dont want to admit it..
but i think we stopped a little too late.. because you can
"come" more than once..right? So that was a couple days
ago and i'm just worried. can we swap information, if you know any?
I know a couple days isnt much at all, but id like to be
prepared just in case...
I just have a "gut feeling".. and i'm too scared to tell my friends, parents,
and even my boyfriend. i cant stop thinking about it. even dreams! but i
read on this website at home tests arent working BECAUSE of the implanon..
Any advice yet???