Help?!

Sheyanne
last night I had unprotected sex. I have no worries because I have implanon right..? Wrong...? After reading all these stories it has me scared and very confused. He came inside of me. Maybe 3 times. I just got implanon in December. And I don't know what to do or how to think. I have no transportation to get to the doctor. I don't know how likely it is for me to be pregnant or what the symptoms are. I do know today I've been spotting.
And I had my period for one day on January the 8th and since then I had brown discharge. On January 15th I also had unprotected sex. I know nothing about pregnancies on implanon or how likely it is to get pregnant while on it. Or should I even worry at all?