Dam birth control

I have the nexplanon arm implant. it is pissing me off. got it in on May 30. when June came my expected period came three days late, but it wasnt a full period I only spotted for 10 days. all I needed my my linker. Well I finally stopped for 9 days then yesturday the spotting started again. idk I'm thinking that when I go to my gyno to do my endometrial biopsy Imma have her take it out and try some other form of birth control because I don't want to keep dealing with this. I don't know if the hormone could be just effecting my polyps and making them bleed but either way I am so over it. anyone else have the nexplanon and how is it effecting you.