Clots/Clumps With Nexplanon?

Okay. So I was on birth control pills 2008- 2014. Just got my Nexplanon October 2014 and have been wiping/peeing out these big clumps of blood. I never had these on pills or before pills. Has anyone experienced this on or not on nexplanon. Considering having it removed because it is gross and disturbing. Otherwise, my Nexplanon is amazing!!