Possible ectopic /fear of ectopic

[u/Imaginary-Storm7801]

I got my nexplanon removed on October 5th had bleeding October 6-11th was intimate on the 11th and 12th.. had nexplanon inserted on September 14th(changed my mind so got it removed).. got a very faint pregnancy test today is this even possible if we were intimate while I was bleeding and to get a positive so early.. I’ve also been having slight pains under my right rib on the back side and pain in my right arm … could I have been pregnant before nexplanon was implanted ? Is it likely ectopic because the line was so faint .. very dull pain in right arm very scared of ectopic